Green’s Dictionary of Slang

1. of a person, lying, spinning a line, telling untrue tales of an experience.

1934		H. Roth Call It Sleep (1977) 247: ‘Aa, yuh full o’ shit!’ sneered the second lieutenant angrily.
1948		Kerouac letter 15 Dec. in Charters I (1995) 176: I think you are full of shit, Allen.
1953		W. Brown Monkey On My Back (1954) 89: The nabs are full of s--. I could tell you plenty, Mister.
1958		W. Talsman Gaudy Image (1966) 189: Just talk, that’s all you are [...] You’re full of shitshat!
1958		C. Lee diary 17 Sept. in Eight Bells & Top Masts (2001) 164: Ainslie says the Chief’s full of shit and it goes to show that he’s got nothing else to do.
1964		H. Selby Jr Last Exit to Brooklyn 13: Harry said he was fullashit, he didnt really see him hit him.
1965		(con. 1930s) R. Wright Lawd Today 81: ‘You full of stuff!’ [...] ‘Stuff my ass!’.
1974		D. Mamet Sexual Perversity in Chicago (1994) 90: You’re fulla shit.
1979		D. Maitland Breaking Out 327: ‘And you,’ Murphy replied, very calmly, ‘are full of cocky shit’.
1980		T. McClenaghan Submariners II i: You’re full of shite Roach.
1985		B. Simon ‘Outers’ Born in the RSA (1997) 84: Ay shut up Boytije – you’re so full of shit I can’t see the colour of you face.
1991		J. Osborne Déjàvu Act II: You’re full of Celtic shit.
1997		C. Newland Scholar 290: You’re full o’ doo doo spee.
2005		K. Huff A Steady Rain I i: And I tell Joey he’s fulla shit. Which he is usually.
2010		L. Redhead Thrill City [ebook] Don’t listen. She’s full of shit.
2018		C. Hammer Scrublands [ebook] 'Nah. They’re full of shit’.
2019		N. Walker Cherry 29: I thought it wasn’t possible that he could actually like the album. I thought maybe he was being full of shit about it, but it was his car.
2021		T. Swerdlow Straight Dope [ebook] [N]ow that we’ve established that we’re all full of shite let’s talk straight.
2021		L. McInerney Rules of Revelation 25: They talked about whether there was such a thing as a guilty pleasure, they intersected neoliberalism and treason, [...] everyone was full of shit and Mel could not have been happier.

2. unpleasant, distasteful.

1939		H. Miller Tropic of Capricorn (1964) 247: He showed them up. He said they were full of shit.
1962		H.S. Thompson letter 6 June in Proud Highway (1997) 341: The people at the Embassy [...] are so full of shit.
1977		E. Torres Q&A 87: You’re full of shit. I never took a dime.
1989		Pileggi & Scorsese Goodfellas [film script] 61: You’re so full of shit.
1999		N. Cohn Yes We Have No 300: They can be bitchy [...] and full of shit.
2003		T. Dorsey Stingray Shuffle 107: Rebecca [...] actually deserved to be pretty, because it wasn’t going to make her full of shit.