Top Definition
With your ball sack stretched over the mouth and nose of the receiver you then grab the base of your cock and slap them between the eyes and forehead with the tip. Works best when erect or semi pudged.

Zach: Dude did you see that? I BatSlapped LB so hard it left a red mark on her forehead.

Tom: That was so funny!

Chris: Awesome
by Bat-Wing March 23, 2009
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