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The sound made when you thwack something or someone with something twangy or when you hit something with an item like a Baseball bat with enough force to make the item whistle when it swings through the air.

Also can be used to emphasize a point, kinda like "oh snap" or "hell ya!" (but rarely)
1) Joe: Hey Mike! Whats with the metal rod?


Mike:You talkin to me?!

2)Jake: Hey man, I just got me a brand new VW!

Jesse: Fw'PAM!
by Crack_Shack December 19, 2009
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