To fill a bathtub with water in preparation for taking a bath.

(idiomatic) Without thinking seriously about the consequences.

(idiomatic) To photographically capture an image / (informal) Used as a rebuke to someone perceived to be staring at one. Also take a picture, it'll last longer.

(idiomatic) To look quickly at someone or something, hoping that nobody notices the action.

To fill a bathtub with water in preparation for taking a bath.

To behave in a proper and lawful manner; to obey the rules and expectations of society. / Used other than figuratively or idiomatically: see walk, straight, line.

(idiomatic, informal, sometimes humorous) Used to instruct a couple to stop displaying physical affection in public.

Alternative form of is the Pope Catholic?

To continue to wage war when it is clear that one is not going to win. / (idiomatic) To try to do something so difficult that it will probably end in failure.

successively, one after the other. / Placed in a straight line.