What is Roul?
1.
Cock.
There can be only one Roul in a hen house.
Dude1: U r a Wanker.
Dude2: Well, U r a cock.
See
2.
Competitive person, usually good at many things.
"So man, loaded for the event ?"
"Dude, in this game there is only one ROUL, and that's ME !"
See