the.com/barn door
The zipper equivalent of a car alarm no one checks before leaving the house.
means The gap in a man's trousers left open when the zipper or buttons haven't been fastened — also the stable door it's named after, both famous for being noticed only after something has escaped.
from The phrase rides on the old proverb about shutting the barn door after the horse has bolted — pointless, too-late action. Barns themselves trace to Old English 'bereærn,' literally 'barley house,' a compound of 'bere' (barley) and 'ærn' (house/storage place). The trouser-fly sense is a much newer, jokey extension: your 'barn door' is open, meaning something's escaped notice — a wink at the proverb rather than a documented old usage.
- polite euphemism
- means your fly is open
- origin
- farmhouses had barns, barns had doors
- social contract
- someone must tell you, awkwardly
- etiquette tip
- whisper it, never announce it