(slang) it is wise to wear a condom before sexual intercourse.

Used to introduce, or alluding to, an apt adage.

(humorous) A phrase used to reply to the question what time is it?.

Asks the interlocutor if they require assistance.

(informal, usually humorous) Used as a reply to see you, see you later, see you soon etc., implying that if the speaker sees the interlocutor first then the speaker will avoid the interlocutor.

(informal) Goodbye, farewell.

(informal) A greeting roughly equivalent to how are you.

Synonym of what time is it

The desired outcome may not be as desirable once it has been attained.

Alternative form of better the devil you know than the devil you don't know