Two or more guys that have come to the understanding that they will only lick each other's ass in order to not be defined as gay.
Derek: "We just ate each other's ass, does that make us gay!?"
Sid: "Fuck no, as long as we didn't touch each other's cock, we are now rim bros"
Sid: "Fuck no, as long as we didn't touch each other's cock, we are now rim bros"
by JbMalone July 9, 2018
Get the rim brosmug.