when pigs fly
Never, as in Sure he'll pay for the drinks
when pigs fly. Equating the flight of pigs with something impossible dates from the early 1600s, when several writers alleged that pigs fly with their tails forward. The idiom is also put as pigs may fly.
| a scrap or morsel of food left at a meal. |
| a fool or simpleton; ninny. |
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.