A farewell said in the evening or before going to sleep. / (colloquial, dated) Expressing incredulity.

(idiomatic) To deceive or cheat someone.

Start off on a good note to reap the benefits at the end.

It is better to mind one's own business than get involved with other people's affairs.

Literally, what is good for a female goose is equally good for a male goose (gander); or, what is good for a woman should be equally as good for a man.

Britain standard form of good fences make good neighbors.

(idiomatic) A male friend or chum, especially a schoolmate; a man with an established network of friends who assist one another in social and business situations; a decent, dependable fellow.

(idiomatic, informal) Good enough.

At a suitable moment in time. / (as a set phrase) One should be patient.

plural of good old boy