Short for may the gods bless you.

(idiomatic, colloquial) Emphasises the truth of a statement. / Used other than figuratively or idiomatically: see I, can, tell, you.

A request for clarification of an anterior statement or question. / An expression of surprise, annoyance, or disagreement to an anterior statement.

(idiomatic) An admonishment to someone who has left a door open.

(humorous) Said as a mild admonishment to somebody who is always complaining.

(grammar) The unstated subject of a command sentence, where it is assumed the subject is the person to whom the command is directed.

Used to express complete agreement with a previous statement by the interlocutor.

Alternative spelling of YOB (year of birth)

Initialism of year of birth.

(in response to a question) I don't know!