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1.
Purposely slamming your elbow against any thing hard then masturbating with the hand from the same arm while it tingles.
"Why is your elbow black and blue?"
"I needed that extra bit of excitement while beating off last night and overdid a funny boner."
by uncleM October 13, 2009
 
2.
When you laugh with a boner.
Watching Olivia Munn on the daily show gives me a funnyboner.
by Herbert Fussmucker August 28, 2010