2 definitions by X3no

While in the missionary position you thrust and you jam your thumb down (his or her) throat while slapping her tits
by X3no May 20, 2021
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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!
by X3no June 10, 2013
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