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When your cocked and loaded, condom on, about to bang your bros ex girl, your boner thinks more clearly then you and says no, and retreats like the British in any war ever.
Bro #1 walks out of room in the morning, " bro I almost banged (insert bro) ex last night, she is super dumb and hot,but I couldnt do it." Bro #2" bro boner dude."
by one who tames strange March 06, 2014
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2
Of or relating to the mutual respect and affectionate regard between "bros" resulting in what is commonly referred to as a bro-boner
eg:

"Dude! That totally gave me a bro-boner."
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