when hell freezes over

(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 hell freezes over!
Teenaged Girl: That’s so unfair!

Husband: I’m going to the strip club tonight. See you tomorrow morning.
Wife: When hell freezes over, 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 hell freezes over.

From the News:

Hell Freezes Over, When Pigs Fly

Media:

Similar idioms:

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