(literally) Offering unlimited food to a diner at a restaurant for a fixed price for as long as he or she continues to eat.

(idiomatic) Indicating that nothing that could be said would add to or improve the situation.

A request for help.

Alternative form of two can play that game

Alternative form of a cat may look at a king

(idiomatic) To postpone a decision or action; to procrastinate.

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

(idiomatic, US, vulgar, imperative) Alternative form of shit or get off the pot.

Alternative form of two can play that game

Alternative form of when pigs fly