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When you are so intensely afraid of another individual that you reach a point of sexual arousal. The fear boner is a sign of submission to a more powerful individual.
I hope Professor Tony Yueng didn't see my fear boner in class today.
by Tod Jenkins September 15, 2010
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An unexpected boner provoked by a frightening experience or unusually strong or dangerous potential mate.
Sally: I'll break your fucking nose, Tom.
Tom: Fear boner, activate!
by jpb103 May 19, 2016
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When you get scared and BAM! Boner.
a black guy trys to jump you but really he wants to ask for directions to kfc but you get so scared(because hes black) that you get fearboner.
by sack dude April 25, 2012
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