This is something you say to someone when they do or say something extremely stupid. If someone does or says something stupid you say "thats a chop" and karate chop the back of their neck. The strength of the chop depends on how stupid the words or actions of the person was.

An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.

used when someone says a statement that makes no sence or is extremly stupid or most likely obvious

This is a saying used when someone says or does something extremely stupid or obvious. It came from the show "Workaholics". When someone does or says something as above, the person who says "that's a chop" is allowed to karate chop the back of their necks. The harshness of said chop depends on the action or words of the receiver. It comes in many forms.
Family pack - everyone in the room is allowed to chop the receiver
Hardies - hard chop
Softies - soft chop (when it wasn't too stupid or obvious)
Selfie - receivers chips themself