According to Lian Cartman from South Park, it's when you contort yourself into a pretzel and allow someone to give you oral pleasure in, on and around your sphincter.
SHEILA: What did my son say Mr. Mackie? Did he say the S-woid?
MR. MACKIE: No, it was worse than that.
SHEILA: The F-woid?
MR. MACKIE: Well here’s a short list of the things your kids've been saying, m’kay?
SHARON MARSH: Oh dear God!
SHEILA BROFLOVSKY: What the heck is a "rimjob"?
LIAN CARTMAN: Oh, why that’s when you put your legs behind your head and have someone lick your ass!
MR. MACKIE: No, it was worse than that.
SHEILA: The F-woid?
MR. MACKIE: Well here’s a short list of the things your kids've been saying, m’kay?
SHARON MARSH: Oh dear God!
SHEILA BROFLOVSKY: What the heck is a "rimjob"?
LIAN CARTMAN: Oh, why that’s when you put your legs behind your head and have someone lick your ass!
by Jinzo January 17, 2005
by Jinzo April 16, 2005
by Jinzo April 16, 2005