Green’s Dictionary of Slang

crock of shit n.

also bucket of shit, crock of bullshit, ...crap, load of shit
[SE crock, a pot + shit n. (1a)]

a useless, unpleasant event, object or experience; a lying statement.

[US] in T. Shibutani Derelicts of Company K (1978) 254: Where you get dat racial equality sheet? Dat’s a crock of sheet!
[UK]K. Williams Diaries 7 Aug. 135: What an incredible lot of amateurs I am among! What a crock of shit.
[US](con. WWII) R. Leckie Marines! 45: What a crock o’ crap [...] What a crock o’ chicken crap.
[US](con. 1940s) G. Mandel Wax Boom 79: There was a good many facts I understood before this here man come along and started hollering a whole crock of shit. [Ibid.] 277: You’re a crack in this whole crock of shit now.
[US]L. Heinemann Close Quarters (1987) 249: Bravo Six, that skinny fucking lifer, rapped him a crock of bullshit.
[US]Maledicta 1 (Summer) 76: Nixon’s statement was bullshit, and his answer to my question was a crock of shit, too.
[UK]T. Jones Adrift 271: Welfare is a crocka shit.
[US]T. Wolfe Bonfire of the Vanities 293: An odious little man who wore a cap, kept using the expression ‘crock a shit’.
[UK]M. Dibdin Dark Spectre (1996) 27: We’d beaten the system yet again, put one over on the whole Establishment crock of shit.
[Aus]G. Seal Lingo 122: that’s a load/bucket/crock of shit are common terms for lying or skiting.
[US](con. 1964–8) J. Ellroy Cold Six Thousand 85: The Mormon Church is a crock of shit, and you know it.
[Ire]G. Coughlan Everyday Eng. and Sl. [Internet] Ball of shite (n): as in, my dad’s old car was a ball of shite. [Ibid.] Crock (n): bad car; crock of shite is same as ball of shite.
[UK]Guardian 30 Aug. 16/1: ‘You must agree [...] that life’s a joke, a crock of shit and then you croak".
[US]S. King Finders Keepers (2016) 245: Ain’t that a crock of you-know-what.