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.

Common Names:

Name	Pronounced	Usage
Sara	SAH-rah (Spanish, Finnish, Dutch, Polish), ZAH-rah (German), SER-ə (English), SAR-ə (English), SAH:-rah (Arabic)	Greek, Spanish, Italian, Portuguese, Catalan, Swedish, Norwegian, Danish, Icelandic, Finnish, German
Williamson	['wiljəmsən]
Gopala	-	Hinduism
Balmer	['bɑ:mə]
Jake	JAYK	English
Bald	[bɔ:ld]