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2.
A common phenomena that occurs within the groin region of a male's body.

Over 90 percent of incidents are reported by concert-goers, the rest by house party-goers.

It occurs when the bass being played in the surrounding environment turns so loud that is causes a woman's breasts to literally bounce. The male notices the bouncing breasts and continues to stare at them, inducing an erection.
You thought that was a Bass Boner, imagine skrillex.
by Cowtoy August 14, 2012
 
1.
The effect when amazing bass drops and raging give you a raging boner.
Dude, I just heard the Bassnectar remix of Lights and totes got a bassboner.
by skiandestroy May 30, 2012