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1.
The mark left on a girl's leg after a long night of dry humping.
Armando: What the hell is that on your leg?!
Manda: That's the boner bruise you gave me last night... asshole.
by Plowman September 22, 2007
 
2.
that painful feeling on your mons pubis the morning after dry humping a guy with a boner
Brittany: 'Do you want to go on a bike ride today?"
Me: "No, I have a huge boner bruise from last night."
by britkav July 14, 2012
 
3.
A bruise on the inner thigh caused by a rapidly expanding erection whereby the tip of the penis impacts forcibly into the leg.
Damn that girl Audrey is so hot every time I see her i get a boner bruise.
by Blackcox44859 August 08, 2013