Shearer said he thought the Blacks Cats boss would be axed if his side failed to beat fellow strugglers Reading at the Stadium of Shite on Tuesday night.
Sunderland plunged into the bottom three in the Premier League with Saturday's 3-1 home defeat by Chelsea.
At the end of the day - Shearer only said what the whole country is thinking - the Mackems are looking relegation in the face.
Martin O'Neill: 'I think it's an easy thing to point to, so what do you do?
"Put someone else in charge, give him 12-13 games and he can't win any matches?
"He (Shearer) has had a go at this himself. Alan must have some idea of how you lose a game or two.
"It really doesn't worry me what Alan says. You lose games and you get fired at.
"He is a pundit. I have been there myself during European evenings and given a trivial amount back.
"I usually try to give someone criticism that I will never see again in my life - such as somebody playing for Inner Mongolia.
"The centre-forward from Inner Mongolia should do better. Or he should have a look at himself. Or he will be disappointed with the shot that flew off the post - I have done that.
"I don't want to sound boastful, but not only am I the best man for the job but the only one.
"I once really doubted myself before I sat my 11-plus - honestly. I didn't know whether I was going to pass it or not, but then I was only seven at the time (*I think you will find you were 11, Martin). And I did pass it.
"'I used to hate managers talking about a project that will take five years. I don't want that. You would get bored to death if we were in the same position for the next four or five years.
"Just give me time. I have signed two players for money. I think Adam Johnson will start to produce the form he is capable of and Steven Fletcher has done really well.
"So wait until we get a few people in and I will try to pull this whole thing together. I don't want four years. I would want to do it in doubly quick time, but not as quick as this."
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NEWCASTLE UNITED FC 2012/13
Newcastle United Fixtures
Saturday December 15 12:45 Newcastle Utd v Manchester City
Saturday December 22 15:00 Newcastle United v QPR
Wednesday December 26 15:00 Man Utd v Newcastle United
Saturday December 29 17:30 Arsenal v Newcastle United
FULHAM 2 NEWCASTLE 1 (Ben Arfa)
Krul, Simpson, Coloccini, Williamson, Santon, Gutierrez, Tiote (86' Bigirimana), Anita (86' Marveaux), Ben Arfa (70' Shola Ameobi), Cisse, Ba.
Subs: Harper, Perch, Ferguson, Tavernier
NEWCASTLE 3 WIGAN 0 (Ba 2 - 1 pen, Bigirimana)
Krul, Simpson, Williamson, Coloccini, Santon (49' Ferguson), Marveaux, Tiote (46' Bigirimana) Anita, Gutierrez (75' Sammy Ameobi), Ba, Cisse
Subs: Harper, Shola Ameobi, Ranger, Tavernier
STOKE 2 NEWCASTLE 1 (Cisse)
Krul, Simpson, Coloccini, Williamson, Santon, Anita (87' Sammy Ameobi), Perch, Tiote, Gutierrez, Ba, Cisse (87' Ranger).
Subs: Elliot, Bigirimana, Marveaux, Ferguson, Tavernier
SOUTHAMPTON 2 NEWCASTLE 0
Krul, Simpson, S Taylor (90+1' Perch), Williamson, Santon, Anita (66' Marveaux), Tiote, Gutierrez, Ferguson (46' Sammy Ameobi), Ba, Cisse.
Subs: Harper, Bigirimana, Ranger, Tavernier
NEWCASTLE 1 SWANSEA 2 (Ba)
Krul, Simpson (74' Bigirimana), S Taylor, Williamson, Santon, Ben Arfa, Anita, Tiote, Ferguson (46' Shola Ameobi), Sammy Ameobi (79' Marveaux), Ba.
Subs: Elliot, Amalfitano, Tavernier,Abeid
NEWCASTLE 0 WEST HAM 1
Krul, Simpson (79' Obertan), Steven Taylor, Williamson, Santon, Ben Arfa, Cabaye, Gutierrez (24' Anita), Ferguson, Cisse (45+5' Shola Ameobi), Ba
Subs:Elliot, Amalfitano, Bigirimana, Marveaux.
LIVERPOOL 1 NEWCASTLE 1 (Cabaye)
Krul, Anita, S Taylor, Coloccini, Santon, Perch (26' Simpson), Cabaye (68' Ferguson), Gutierrez, Ben Arfa, Cisse, Ba (49' Sammy Ameobi).
Subs: Harper, Williamson, Shola Ameobi, Obertan.
NEWCASTLE 2 WEST BROM 1 (Ba, Cisse)
Krul, Simpson (61 Cisse), Coloccini, Williamson, Santon, Ben Arfa, Cabaye, Perch, Gutierrez, Ba (72 Sammy Ameobi), Shola Ameobi (61 Obertan).
Subs: Harper, Anita, Steven Taylor, Ferguson.
SUNDERLAND 1 NEWCASTLE UTD 1 (Cabaye)
Krul,Simpson, Williamson, Coloccini (79' S Taylor) Santon, Gutierrez, Cabaye, Tiote, Ben Arfa (83' Obertan), Ba, Shola Ameobi (38' Perch).
Subs: Harper, Anita, Cisse, Ferguson
NEWCASTLE UTD 0 MAN UTD 3
Harper, Santon, Perch, Williamson, Ferguson (63' Anita), Ben Arfa, Tiote (80' Bigirimana), Cabaye, Gutierrez, Cisse (63' Shola Ameobi), Ba
Subs: Alnwick, Simpson, Obertan, Sammy Ameobi
READING 2 NEWCASTLE 2 (Ba 2)
Harper, Perch, Williamson, Steven Taylor (Tavernier 56), Santon, Ben Arfa, Tiote, Bigirimana (Ferguson 70), Gutierrez, Cisse (Shola Ameobi 69), Ba.
Subs not used: Elliot, Anita, Obertan, Sammy Ameobi.
NEWCASTLE 1 NORWICH 0 (Ba)
Harper, Perch, Williamson, Steven Taylor, Santon, Ben Arfa (Shola 85mins), Anita (Tiote 76 mins), Cabaye, Jonas, Cisse (Obertan 70 mins), Ba
Subs unused: Elliot, Tavernier, Bigirimana, Sammy Ameobi
EVERTON 2 NEWCASTLE 2 (Ba 2)
Harper; Perch, Williamson, Taylor, Santon; Anita, Cabaye (Bigirimana 93), Gutierrez; Marveaux (Ba 46), Ben Arfa; Cissé (Shola Ameobi 80).
Substitutes not used Elliot (g), Gosling, Obertan, Tavernier.
NEWCASTLE 1 ASTON VILLA 1 (Ben Arfa)
Krul, Simpson (Bigirimana 38), Steven Taylor, Coloccini, Santon, Ben Arfa, Cabaye, Anita, Gutierrez (Marveaux 86), Ba (Obertan 86), Cisse
Subs not used: Harper, Williamson, Gosling, Amalfitano
CHELSEA 2 NEWCASTLE 0
Krul, Simpson (Ryan Taylor 64), Steven Taylor, Coloccini, Santon (Marveaux 74), Ben Arfa, Anita, Cabaye (Perch 77), Gutierrez, Ba, Cisse
Subs not used: Harper, Williamson, Gosling, Obertan
NEWCASTLE 2 SPURS 1 (Ba, Ben Arfa pen)
Krul; Simpson, S Taylor, Perch, Santon; Ben Arfa, Cabaye (Anita, 71), Tiote, Gutierrez; Cisse, Ba (Obertan, 85). Subs not used: Harper; R Taylor, Williamson, Gosling, Amalfitano
BORDEAUX 2 NEWCASTLE 0
Elliot, Tavernier, Williamson (74' Coloccini), Perch, Ferguson, Abeid, Bigirimana, Ranger, Marveaux, Sammy Ameobi (46' Anita) Shola Ameobi (80' Cisse)
Subs: Krul, Simpson, Romain Amalfitano, Campbell
NEWCASTLE 1 MARITIMO 1
Krul, Simpson, S Taylor, Coloccini, Santon, Marveaux, Bigirimana, Anita, Sammy Ameobi (76' Abeid), Ben Arfa (40' Ba), Cisse (50' Amalfitano)
Subs: Elliot, Williamson, Ferguson, Tavernier'.
CLUB BRUGGE 2 NEWCASTLE 2 (Anita, Shola Ameobi)
Krul, Anita, Williamson (58' Steven Taylor), Coloccini, Tavernier, Tiote, Sammy Ameobi (83' Amalfitano), Marveaux, Bigirimana (72' Cabaye), Obertan, Shola Ameobi
Sub: Elliot, Santon, Cisse, Shane Ferguson
NEWCASTLE 1 CLUB BRUGGE 0 (Obertan)
Harper, Perch, Santon, Steven Taylor, Ferguson 80 (Cabaye), Obertan, Tiote, Bigirimana, Anita 46' (Shola Ameobi), Sammy Ameobi 73' (Coloccini), Cisse
Subs: Krul, Ben Arfa, Ba, Campbell
NEWCASTLE 3 BORDEAUX 0 (Shola Ameobi, Henrique og), Cisse)
Elliot (Harper, 46 ); Simpson, Williamson, Perch, Ferguson; Anita, Tiote (Gosling, 71), Cabaye (Bigirimana, 61); Cisse, Ameobi, Obertan.
MARITIMO 0 NEWCASTLE 0
Elliot, Santon, Williamson, Perch, S Taylor, Gosling, Amalfitano (Ferguson 76), Bigirimana, Obertan (Marveaux 80), Vuckic (Sami Ameobi 53), Shola Ameobi.
Subs (not used): Harper (gk), Tavernier, Abeid, Campbell
NEWCASTLE 1 ATROMITOS 0 (Vuckic)
Krul, Simpson, Coloccini, Williamson, Ryan Taylor (11 Vuckic), Obertan, Bigirimana, Perch (59 Tavernier), Marveaux (91 Amalfitano), Gosling, Ba.
Subs: Harper, Cabaye, Cisse, Campbell.
ATROMITOS 1 NEWCASTLE 1 (R Taylor)
Harper; Tavernier, Williamson, Perch, R Taylor; Bigirimana, Anita; Obertan, Gosling (Amalfitano, 64), Marveaux (Gutierrez, 71); Cisse (Campbell, 77). Subs not used: Krul, Santon, Cabaye, S Taylor.
MAN UTD 2 NEWCASTLE 1 (Cisse)
Elliot, Coloccini (Ferguson 61), Williamson, Perch, Tavernier, Gosling, Marveaux, Tioté (Bigirimana 71), Obertan, Vuckic (Cisse 81), Shola Ameobi.
Subs not used: Harper, Anita, Amalfitano, Sammy Ameobi.
CARDIFF CITY 4 NEWCASTLE 1 (Shola Ameobi pen)
Krul, Simpson, Coloccini (Williamson 46), Steven Taylor (Gosling 63), Santon, Obertan (Campbell 83), Tiote (Amalfitano 71) , Gutiérrez, Marveaux (Vuckic 46), R Taylor (Perch 28), Shola Ameobi.
HARTLEPOOL 1 NEWCASTLE 5 (Shola Ameobi, Marveaux 2, Obertan, Vuckic)
Harper (Alnwick 82), Simpson (Good 72), Tavernier, Williamson, S.Taylor (Vuckic 46), Perch (R.Taylor 72), Gosling, Amalfitano (Santon 80), Marveaux (Obertan 78), Sh.Ameobi (Ben Arfa 46), Bigirimana (Abeid 59).
DEN HAAG 0 NEWCASTLE 0
Krul; S Taylor (Gosling 65), R Taylor (Perch 71), Coloccini, Santon (Simpson 80); Obertan (Bigirimana 71), Tiote (Ameobi 71), Vuckic (Williamson 65), Gutierrez; Ba (Amalfitano 82), Cisse
BRAGA 1 NEWCASTLE 2 (Ba, R Taylor)
Harper; Simpson, Tavernier, Coloccini, R.Taylor; Sammy Ameobi (Obertan 88), Tiote (Cabaye 70), Gutierrez, Marveaux; Cisse, Ba (Vuckic 85).
OLYMPIACOS 1 NEWCASTLE 1 (S Taylor)
Krul, Perch, Williamson, S.Taylor (Dummett 46), Santon, Obertan (Sammy Ameobi 72), Bigirimana, Gosling (Abeid 36), Amalfitano, Vuckic, Shola Ameobi (Cisse 72).
FENERBAHCE 1 NEWCASTLE 1 (Abeid)
Elliot, Simpson (Santon 68), Tavernier, Coloccini, R Taylor, Tiote (Bigirimana 59), Gosling (Abeid 73), Obertan (Shola Ameobi 75), Marveuax (Gutierrez 59), Vuckic (Sammy Ameobi 46), Ba (Cisse 68).
MONACO 0 NEWCASTLE 1 (Ba)
Harper, Santon (Ryan Taylor 57), Simpson, Williamson (Perch 46), Gutierrez, Amalfitano (Obertan 62), Abeid (Tavernier 46), Bigirimana (Tiote 62), Sammy Ameobi (Vuckic 46), Shola Ameobi (Gosling 62), Ba (Marveaux 78)
CHEMNITZER 1 NEWCASTLE 0
Elliot; Tavernier (Simpson, 70), Williamson, Perch, R Taylor (Santon, 70); Obertan (Gutierrez, 77), Abeid (Bigirimana, 70), Gosling, Amalfitano; Vuckic (Shola Ameobi, 70), Sammy Ameobi (Ba, 77). Sub not used: Harper.