R63 is a Roblox version of porn made by some loser who is attracted to legos. It is just Roblox characters fucking and stuff please don't ever post this or watch it.
Chad101: Roblox R63 is stupid Virgin69: R63 is the best porn wdym.
Short for the phrase "Rule 63". Rule 63 is the "internet law" that if it exists, there is a genderbent version of it, often applying to male characters. As of now, it's commonly used to refer to Roblox pornography.
"What's R63?"
"It means that if something exists, there is a genderbent version of it. Now little children use it to refer to Roblox porn."
A genderbent Roblox character who was given boobs to seem more attractive towards degenerates or something idk. its also used to describe Roblox pornography
Wow, just wow. First you become attracted to Hatsune Miku, and now you're attracted to a Lego figure with breasts. You like R63's