Top Definition
To hit someone in the testicles by surprise (generally with a flicking motion from the wrist, and using the back of the hand to make contact), usually while performing the action (ball twanging someone) one shouts "BALL TWANG!"
{Smacks guy in crotch}"BALL TWANG!"

"Dude, why ya waddlin' ??"

Jerry gave me a Ba' tang"
by Jorge67 October 13, 2007
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