Top Definition
When you think you see a hot girl far away, but as you get closer you realize she is not hot at all. It's like a mirage for your boner.
John: Oh man that girl looks so hot... I'm about to pop a huge boner..

two minutes pass and they get closer.

Bob: Ew, dude, she's actually really ugly.. Bonerage..
by LucasAT February 03, 2006

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