From WordNet dictionary, version 3.0:
crap
n. 1. obscene terms for feces
Synonyms: dirt, shit, shite, poop, turd
2. obscene words for unacceptable behavior; "I put up with a lot of bullshit from that jerk"; "what he said was mostly bull"
Synonyms: bullshit, bull, Irish bull, horseshit, shit, dogshit
v. 1. have a bowel movement; "The dog had made in the flower beds"
Synonyms: stool, defecate, shit, take a shit, take a crap, ca-ca, make