15. desember
You get to slap anyone’s ass for a whole day
National slap ass day is where you Walk up to a girlfriend or boyfriend or someone and slap there bum
slap ass day
by ShrekFan420 December 14, 2020
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On October 29th you have to slap a girls ass atleast twice. Remember slap de ass
by Its the JJJ October 5, 2020
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On the 2nd of March its national slap ass day, so go slap some asses
everyone its Slap ass day to day
by Peter Nilsen February 28, 2020
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janurary 4th is the slap ass day

where anyone needs to slap their partner's or crush's ass
SO: "hey why did you slap my ass?"
You: "it's slap ass day"
by Naku :3 January 3, 2023
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The day of when you can slap a girls ass without any consequences.
Yo chad did you know it was national slap ass day?
No I didn’t brad! That’s sick
by Yummy penis October 1, 2019
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December is all about fun and excitement so why not grab or slap someone’s ass for your enjoyment!!
girl: ow why did you slap/grab my ass
boy: duh because it’s national slap and grab ass month!
by hello yam November 30, 2020
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December is the time for celebration and enjoyment so why not slap and grab someone’s ass!
girl: why did you slap my ass
boy: because it’s national slap and grab ass month!
by hello yam November 30, 2020
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