It is not on April 7 and well it's actually not a holiday at all so lol
"Yo I'm a fukboy and want to slap an ass today"

"To bad there's No national slap girls ass day"
by YourBoyTW April 7, 2017
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On April 25th, 2018. YOU have to Slap he/she ass, no matter how close you are with the person
Slap the person Ass on National Ass Slap Day
by X8x8x8x8x8xskwkc April 25, 2018
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On the 6th of April every year you need to slap a girls ass to celebrate the holiday
Daam it’s national ass slapping day and that girl has a nice ass
by Yoboycam April 5, 2018
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National slap you crushes ass day.Get out there and slap some ass
Person 1: hey you know what day it is?
Person 2: its December 13 why?
Person 1: its national slap your crushes ass day.
Person 2: oh ok (slaps ass)
by Oakpaw December 7, 2019
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Slap your friend’s ass day is on July 28th so don’t forget to slap their ass
The definition of National Slap your Friend’s Ass Day is basically don’t pussy out and SMACK DAT BOOTY
by Jax1995 June 27, 2019
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You get to slap ur crushes ass
Me: *slaps crushes ass*

Crush: “why did you do that?”

Me: “I had to it’s December 5th national slap ur crushes ass day
by Imcoolright December 6, 2019
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This is the day when you get to playfully slap the ass of your bestfriend of the opposite gender. That's where the his/her part comes from
by Jake Wall April 12, 2017
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