1 definition by otis wotis

A day where you get to slap your sibling(s) free of charge.

Active December 5th through 10th
Hey (Sibling) Its National Slap Your Siblings Day.

National Slap Your Siblings Day- A day where you get to slap your sibling(s) free of charge.
by otis wotis December 6, 2021
Get the National Slap Your Siblings Day mug.