National Cheat on your Bitch Day, also known as National Cheat on your Boyfriend/Girlfriend/Hoe Day, is September 17. This is the day where you become a terrible person and cheat on your significant other, or your side-chick.
“Yoo! Its national cheat on your bitch day, go cheat on Melissa, she a whore anyway.”
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"