When you want to slap booty this day is a Godsend if you want to complete the challenge then okay
“Hey man are you ready for slap ass friday
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!
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"