Cap Slap is when you cum in ones hand, and then proceed to slap a bald man with your semen covered hand. The man has to be above the age of 36 and be in a public area. Like Walmart.
Man- “Hey, man I just cap slapped your dying grandpa!”
Dude- “Straight up! That’s awesome!”
Man- “ I’m gonna cap slap your child now!”
On the 10th of August, after National Slap Your Brother Day, is National Slap Your sister day. It is a day where you, as it says in the title, a day to slap your femalesiblings.