A term used to express disappointment or to define something as disappointing.
Dude, I think your crush likes someone else.
Well. That's a boner killer.
*after breaking your laptop*
AGHHHHHHHHH. Boner killer!
5👍 5👎
While in the missionary position you thrust and you jam your thumb down (his or her) throat while slapping her tits
Wanna do the Kentucky plug tonight