Used to add annoyed emphasis to an associated statement.

Alternative form of know one's own mind

Used to show a relevant fact that is unknown to a person, or that the result or sequence of events differs greatly from what one had expected with the little knowledge he or she had about the situation beforehand.

One will demand or expect justification; used in threats.

Alternative form of know whether one is Arthur or Martha

present participle of know where the bodies are buried

(slang, informal) To exercise sound judgment in a situation that is precarious and uncertain.

present participle of know when to fold 'em

present participle of know which end is up

Something bad and familiar is better than something bad and unknown.