When someone has an attitude or is hella worked up and needs to calm the f**k down. A reference to the Snickers commercials when someone "is not themself" until they eat a Snickers.
Friend 1: What the hell is wrong with Dee?
Friend 2: I don't know, but she needs to eat a Snickers and have a seat.
Friend 2: I don't know, but she needs to eat a Snickers and have a seat.
by deeBoe October 16, 2014