when pigs fly

(idiom) never

Example Sentences:

Teenaged Girl: Mom, can I go to the dance with my new boyfriend?
Mom: How old is he?
Teenaged Girl: 25
Mom: Sure, you can go…. When pigs fly!
Teenaged Girl: That’s so unfair!

Husband: I’m going to the strip club tonight. See you tomorrow morning.
Wife: When pigs fly, it’s our anniversary!
Husband: Okay, I’ll be home at midnight then.

I asked my boss if I could take my vacation during the busiest time of the year, but she said that could only happen when pigs fly.

From the News:

Hell Freezes Over, When Pigs Fly

Media:

Similar idioms:

1. when hell freezes over
2. over my dead body
3. fly in the face of
4. fly in the ointment
5. go fly a kite
6. burn the midnight oil
7. open up a can of worms
8. cat got your tongue
9. not a hope in hell
10. check in with