Alternative form of know whether one is Arthur or Martha

Third-person singular simple present indicative form of know where the bodies are buried

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

Third-person singular simple present indicative form of know when to fold 'em

Third-person singular simple present indicative form of know which end is up

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

Alternative form of better the devil you know than the devil you don't know

Alternative form of better the devil you know than the devil you don't know

Alternative form of better the devil you know than the devil you don't know

(transitive, simile) To be intimately knowledgeable about something.