eat it, v. — Green’s Dictionary of Slang

eat it v.

1. to perform oral sex.

1963		in T.I. Rubin Sweet Daddy 95: She made a big deal about eating it.
1964		B. Jackson Get Your Ass in the Water (1974) 139: She said: ‘If you want this here you got to eat it like a rat do cheese.’.
1999		Dr Dre ‘Let’s Get High’ 🎵 Got all y’all niggaz vexed to fuck this triple-X rated hoe / You say you ain’t eat it – you ate it though.

2. to suffer humiliation, esp. in attaining a desired goal.

1934		(con. 1920s) J.T. Farrell Young Manhood in Studs Lonigan (1936) 393: If he hasn’t got the con, I’ll eat it on State and Madison at high noon.
1952		J. Jones From Here to Eternity (1998) 79: There was much goosing, grabbing of crotches and accusations of ‘You eat it!’ with the hooting laughter.
1960		E. De Roo Big Rumble 134: We got to stop eatin’ it. They think we’re scared of ’em.
1981		J. Sullivan ‘Big Brother’ Only Fools and Horses [TV script] Don’t worry, if the tax man comes I’ll eat it.
1993		S. King Dolores Claiborne 8: As her paid companion, I had to eat it around the clock.
1999		Eble Campus Sl. Apr.
2005		E. Shrake ‘How to Live Forever’ in Davis Permanent Wave 313: Actually they are frightened that we are going to show them up, as indeed we are’ ‘All right then. Make them eat it, Grampaw,’ said Rondelle.

3. (US campus) to do poorly, to achieve low marks.

1967–8		Baker et al. CUSS 111: Eat Do poorly on something.
1970		Frank Zappa ‘Road Ladies’ 🎵 When the P.A. system eats it, / And the band plays some of the most terriblest shit you’ve ever known.

4. to die.

1987		(con. 1967) Bunch & Cole Reckoning for Kings (1989) 51: Five guys ate it right then.
2001		(con. 1975–6) E. Little Steel Toes 110: Sydney was my crimey’s old lady. He ate it.

5. (US) to be unpleasant.

1973

in C. Browne Body Shop 55: This place really eats it.

6. to take responsibility.

1991		D. Simon Homicide (1993) 326: ‘Will you take it?’ they asked again [...] Okay, Worden told them, I’ll eat it.
2019		D. Winslow Border [ebook] ‘You think Lerner is a stand-up guy? [...] That he’d eat it for you?’.