ball sack tap
"dude, did you just give me a ball sack tap?  "i'll give you a ball sack tap if you finish that whole thing of syrup""
the ball sack tap is the deft movement of tapping one's hand, palm up, onto someone else's ball sack (with or without clothes on)
""dude, did you just give me a ball sack tap?  "i'll give you a ball sack tap if you finish that whole thing of syrup""" What is the definition of "ball sack tap"?