What is Ru4rl?
A variation to o rly, ru4rl is internet slang for "Are you for real?" It has many meanings, but is primarily used when a piece of bad or good news is given, and the other person thinks it is some sort of tease.
"Whoa, goatse.cx is now a church site!"
"ru4rl"
See ru4rl, orly, o rly