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
Yo did you know tomorrow is national slap "his/her" ass day
17👍 6👎
When you slap her ass. duh
when u really wanna slap her booty
Hey check out her gyatts!
John: Slap her ass, dude