Top definition
A certain factor a person/object has that makes a man get an erection.
Dead bodies hit the boner factor for necrophiliacs...
by MetalheadRosie666 April 24, 2008
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2
the increase in length of your penis when you have a boner
Dude my dick is like 5 inches not including my boner factor
by say-d April 22, 2008
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