done deal definition
An irrevocable agreement, as in Once you've signed the lease, it's a done deal. This slangy expression, first recorded in 1979, may have come from done thing, originating in the late 1600s.
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|