the one month of the year ( October ) where a boy can grab/slap a girls ass, without being attacked.
It's a typical joke between friends... Boys to it to the girls and the girls do it too.
There are no rules so have fun, don't forget to choose your free shot ( girls ass you can grab whenever )
a : broooo it's "slap ass month" are you excited...
b : bro, I'm gonna abuse my free shots ass, she's so hot omg
a : dude I haven't chosen my free shot yet
b : you should hurry bro, pick a girl with a good ass so you can grab it 24/7
24👍 12👎