(Britain, euphemistic, informal, dated) Used to express amazement and surprise.

(childish) Countering an attack on one's character.

(idiomatic, colloquial) Used to indicate emphatic agreement

(nonstandard) I have not

(offensive, markedly vulgar) Used to epitomize arrogance and selfishness, with dismissive disregard of others.

Used to accept (or call) a bet, and at the same time raise the stakes.

Used to express enthusiastic support for the referent of that.

(Britain) Indicates a selfish attitude, not worried about any problems one's friends and neighbours might have. Often associated with strikes and other trade union industrial actions.

Indicates that the speaker is in need of rest or sleep.

(usually) I need something to drink (e.g., water). / (more generally) I need something, or want something a lot. / (euphemistic) I want an alcoholic beverage.