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1.
when your penis jumps up and down
Tommy did his wang dance after he scored a goal and it wasnt much of a show.
by Phylldis Johnson May 16, 2005
 
2.
Getting it on with a smokin' hot sexy lady
"I'm gonna 'wangdance' her!"
"I was up all night performing my wangdance!"
by Zeggie January 11, 2011