A person that only gets off of Gaping rims during sex who has a huge cock 9 inch +
Dean: "come on sam you always gape my ass aren't you into anything else like a double twisty sloppy toppy 101 deepthroat 900"
Sam "NO I AM THE RIM GAPER"
Johnny sins: Did someone say Rim Gaper??
When you take a piss but rim it off the inside of the toliet bowl
Jim -"I had to make a rim shot last night so i wouldn't wake my parents" Carl - "I tried that yesterday, but it kept going into the toliet water" Jim - "Practice makes perfect baby"
A rim-seat is an adjustable stool with a toilet seat attached that can be lowered over a guy's mouth so he can lick your asshole and give you a randy rim-job.
My cadet roomie, Matt, bought a rim-seat, and when he wants to be rimmed, he brings it out and has me lie down on my back underneath it so I can give him a rim-seat-gasm with my tongue up his asshole!