What is Sack Slap?
1.
1) The act of rubbbing the sweat off of your own testicals and proceeding to smack the nearest individual in the face
2) when one man randomly decides to smack a mans ballsack in the middle of Lunch
'Slap'
TIM- Ahh what was that for, man?
HENRY- Dude, You just got sack slapped!
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2.
When a girl is giving you head and your nut sack slaps her chin, nose or cheek (depending on position), usually after a most-aggressive head bobbing.
Mary gave me a bj last night and she went down so hard she got a sack slap from me also.
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