You set your massage chair all the way up to the top and on percussion, and have your partner rest his/her head on the part of the chair where the percussion is happening. You then place your penis inside your partners mouth for your enjoyment.
by URMOMS POGOSTIK November 9, 2009

Really intense sexual intercourse, especially referring to the climax. Goldie Hawn's character in "The Banger Sisters" uses the expression in a similar way.
When she experienced orgasm, she was in the electric chair!
Dude 1: I put my babe in the "chair" the other night.
Dude 2: Huh?
Dude 1: The Electric Chair!
Dude 2: Huh?
Dude 1: Never mind...
Dude 1: I put my babe in the "chair" the other night.
Dude 2: Huh?
Dude 1: The Electric Chair!
Dude 2: Huh?
Dude 1: Never mind...
by Thin Guy October 20, 2006

by Mandible May 19, 2005

When someone in your game session brags about how good they are and how bad others are at the video game they play. Implying that they are playing the game with a 12" dildo inside of them.
Gamer 1: "lol ur so badddd l2p like me"
Gamer 2: "don't worry about Gamer 1, he's totally on a 12" Gaming Chair"
Gamer 2: "don't worry about Gamer 1, he's totally on a 12" Gaming Chair"
by anonbucket June 9, 2020

Originating from South London, the term is used to describe a taking dump so massive that it resembles an old English style of furniture, characterized by ornately carved chair legs and a dark finish.
by kdwilco September 21, 2013

by Ooga booga uhhh November 6, 2018

A sexual position where the man sits up in bed, reclined and the woman lays perpendicular across his lap, face up, with her ass squarely on his crotch and her legs spread allowing him arm’s length, easy access to her pussy and breasts (or mouth) at the same time. If the man has magic hands, the result is his woman will rock her hips in ecstasy, hence the Devil’s Rocking Chair.
by WordWitch69 December 16, 2021
