An extraordinarily difficult sex act which takes place in a movie theatre. The male must purchase a large buttered popcorn, and without his date knowing, rip a hole in the bottom of the bag and insert his penis. During the course of the film, his date will eventually reach in for a handful of kernals and instead be met with his buttery member.
"I took Danielle to see Ghostbusters and got her a Jumbo Popcorn. Let's just say there was a lot of butter by time the credits rolled."