(idiomatic) To disclose a secret; to let a secret be known, often inadvertently.

(transitive, now often figuratively) To drive something away with blows or military force. / (intransitive, idiomatic, vulgar, colloquial, chiefly US, Canada) To masturbate, usually a man of himself.

(figuratively, idiomatic, often with the verb go) In a risky, precarious, daring, or uncompromising position, especially one outside of the mainstream; vulnerable.

(programming, transitive) To disable a section of source code by converting it into a comment.

(informal, transitive) To make a rude or obscene gesture at someone.

(idiomatic) by the way; now that I think about it; indicates something brought to mind.

(idiomatic) Very familiar; common, hackneyed or out of date.

(now rare, archaic) The vulva; (by extension) sexual intercourse.

(originally US, idiomatic) A big job; a difficult challenge.

A mirror reflecting images on one side and transparent on the other, often used by the police during interrogations.