crock (of shit)
1.
n. a mass of lies and deception worth no more than dung. (Usually objectionable.)
That's nothing but a crock of shit! I don't believe a word of it.
2.
n. a person who tells lies. (Rude and derogatory.)
He's just a crock of shit. He never tells the truth.
3.
n. a braggart. (Rude and derogatory.)
He's such a crock. He makes everything he has done sound ten times better than it really is.