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When an erection causes severe head pains due to loss of blood from the head. Usually caused by abnormally large penises.
Woah woman! Calm down you just gave me the worst boner headache!
by aboutwill May 14, 2010
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2
A metaphor for a throbbing headache, which gets its name by comparing a headache to a throbbing boner.
Whoa dude, I woke up with a boner headache this morning. My head is killing me.
by xJohnn August 08, 2011
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