verb-intransitive. To defecate.v. To defecate in.v. To tease or try to deceive.n. Excrement.n. The act or an instance of defecating.n. Diarrhea. Used with the.n. Something considered disgusting, of poor quality, foolish, or otherwise totally unacceptable.n. A mean or contemptible person.n. A narcotic or intoxicant, such as marijuana or heroin.n. Things; items.n. Foolish, deceitful, or boastful language.n. Insolent talk or behavior.n. Trouble or difficulty.n. A small or worthless amount: He doesn't know shit. interjection. Used to express surprise, anger, or extreme displeasure.phrasal-verb. shit on To treat with malice or extreme disrespect.idiom. get (one's) shit together To get organized; put one's affairs or possessions in order.idiom. give a shit To care the least bit.idiom. no shit Used to express disbelief.idiom. no shit Used to express contemptuous acknowledgment of the obvious.idiom. bricks To become extremely worried or frightened.idiom. up shit creek (without a paddle) In dire circumstances with no hope of help.idiom. when the shit hits the fan When the situation goes awry; when trouble starts.