Do not discharge a weapon. Used originally for weapons needing a spark or lighting of a fuse to ignite gunpowder; now sometimes used to mean any weapon launching a projectile.

Alternative form of caught with one's pants down

(idiomatic) The limit of one’s patience, when one is so frustrated or annoyed that one can no longer cope. / (idiomatic) The point at which one has run out of options or the ability to delay.

(idiomatic) To attempt a skill, craft, trade, or action, possibly for the first time.

(transitive, idiomatic) Have a controlling influence over.

(colloquial) To become enthusiastically involved in.

when walking or running, to reach a full or comfortable pace / (figuratively) to reach a full level of efficiency, competence, comfort, etc.; to get going

Used other than figuratively or idiomatically: see hold, one's, breath. To keep air in one's lungs, pausing noticeably before exhaling after previously inhaling.

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

(figuratively) To regret or retract what one has said.