(colloquial, idiomatic) An admonition of cowardice, usually said to make someone cease harassing or bullying someone else, especially where the bullied party is physically smaller or weaker than the bully.

There are consequences to not wearing a condom on one's penis

(Southern US) Do not act in a manner not in keeping with the way you were brought up.

(rhetorical question, informal, sarcastic) Used as a response to statements starting with "we," usually indicating the speaker does not want to be involved in the interlocutor's statements.

(dated) without permission.

(card games) Synonym of beggar-my-neighbor

(informal) Used to express the speaker's wish that a preceding statement by another speaker were to come true.

(humorous) Used to wish someone luck in an adverse or uncertain situation.

Alternative form of on your mark, get set, go

Alternative form of don't give up your day job