Similar to the wideley known "Rim Job", however in this sweet sexual act, one must speak in a heavy Eastern England accent while swiftfully and forcefully lining another individual's cornhole. To successfully complete it, the person must yell "Rimmmaa!" in the heavy accent, and then give the Rim receiver a hug.
Last night me mate gave me The Rimmer, and by god I got more than I bargained for! The hug after was just somewhat awkward too...
A group of people that rolls 600 pounds deep, which is really no different than if one person acted like the 600 pound gorilla all by themself, it's just bullying spread around a group to fuck with somebody. Just like each person has an asshole, and to some degree is an asshole, a collective 600 pound gorilla has a collective asshole so that no one person has to take responsibility for being the asshole or the one who said this or that.