boner breaker

1. An action or event that totally kills your boner.
2. Also used as an adjective in the place of a word like grenade.

1. John: Did you bone Carrie last night?
Jack: No dude! Her mom walked in and it was a total boner breaker!

1. James: FML! The Netherlands lost the World Cup!
Jason: Total boner breaker!

2. John: Hey, Allie is lookin' pretty cute dude.
Jack: No way bro! Allie is a total boner breaker! You must be drunk dude.