An excuse made by teenage boys to sexually assault teenage girls in school hallways. This causes girls to hang their backpacks down low to cover their ass so that boys won't hit them. Nobody likes this except the perverted boys who participate and there are never any repercussions.
Boy: *slaps girls' asses in the hallway*
Girl: You can't do that. That's literally sexual assault.
Boy: Yes, I can! It's Slap Ass Friday!
Girl: You can't do that. That's literally sexual assault.
Boy: Yes, I can! It's Slap Ass Friday!
by Smell_like.a.gertrude April 4, 2021
Get the Slap Ass Fridaymug. by Big d brownboy April 17, 2019
Get the National slap ass daymug. 
by Naku :3 January 2, 2023
Get the slap ass daymug. by Yummy penis September 30, 2019
Get the Slap ass daymug. Have the right to slap or grab anyone's ass on fridays, it could be anyone, especially your therapist
"did you know it was National Slap ass Friday?"
"I know! do you know that hot cashier at the 7 eleven near my house.. I grabbed her ass, and holy it was nice"
"I know! do you know that hot cashier at the 7 eleven near my house.. I grabbed her ass, and holy it was nice"
by sleepy joebiden August 6, 2021
Get the National Slap ass Fridaymug. by XxpandabearxX December 9, 2019
Get the Slap ass daymug.