shooting your eye out
something bad happening after being repeatedly warned it would, like Ralphie in "A Christmas Story"
Boy, you really ended up shooting your eye out last night. I told you not to drive around without car insurance, and you ended up getting a ticket for 700 dollars...
You'll shoot your eye out
A popular phrase from the movie "A Chiristmas Story" that is first heard by Ralphie's mom when he asks her for a Red Ryder bb gun.
"You'll shoot your eye out, kid."
"Oh, no! I shot my eye out!"
"Oh, no! I shot my eye out!"