adjective
(slang, vulgar) Petty; contemptibly unimportant. (Compare bullshit.)
(vulgar, slang) Cowardly.
noun
(slang, vulgar) A petty and contemptible thing or things.
(slang, vulgar) A coward.
(military slang, vulgar) A low-ranking officer who lords over and needlessly makes life miserable for his underlings; a petty, abusive martinet.
Used other than figuratively or idiomatically: see chicken, shit: chicken manure.