It's a few days between Sep. 17 to Sep. 20 have fun.
National Slap Ass Days is were you go around slapping people's asses have fun.
by Keith Trenton September 18, 2019
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When a boy(or girl) slaps somebody’s ass.
Aye you know that’s it’s National Slap-Ass Day?!”
by Latoya Greggs April 13, 2019
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national slap ass day: n. the day in which you can smack someone’s ass for no reason. “Watch out because tomorrow is slap ass day!”
by hehefam September 9, 2019
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National slap as day is abroad! Go to your guy friends and smack there ass (include no homo) walk to your girl and slap her ass too!
April 11th, national slap ass day. The day of the ass.
by m&mx2 April 11, 2018
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