Definition from Wiktionary, the free dictionary
See also: barndoor
- The large door of a barn.
- (humorous) Something large enough that a miss ought to be impossible.
Buying a barn door won't help your tennis game.
- (euphemistic, humorous) The groin area of a pair of pants.
Somebody forgot to close his barn door again!
- (climbing) An off-balance pivot on two points of contact.