Examples:

• I'll lend him money again when pigs fly or when it's a cold day in hell.
• You think my father will let me borrow his car? That'll happen when it's a cold day in hell.
• I might forgive her for what she did, but it will be a cold day in hell before I forget it.
• Do you think my boss will give me a raise? That'll be a cold day in hell.
• He said he would apologize for what he said, but it will be a cold day in hell before I see him again.
• I'll wear that outfit to school when it's a cold day in hell.
• She might finish her homework on time, but it will be a cold day in hell before she gets a perfect score.
• I might go bungee jumping someday, but it will be a cold day in hell before I do it.
• He said he will quit smoking, but I think it will be a cold day in hell before he actually does it.
• We might be able to get tickets to the game, but it will be a cold day in hell before we get front-row seats.
• It'll be a cold day in hell before I give my heart again .
• It will be a cold day in Hell when I let you borrow my car!
• It seemed a bit much, coming from you.
• It’ll be a cold day in Hell when I go out with you.”
• It'll be a cold day in hell before I sue a faculty member .
• it will be a cold day in Hell before.
• It's difficult to see a cold day in hell in a sentence.
• In actual practice, it would be a cold day in hell before that ever happened.