Clevland Brown is the stereotypical black african american here in the U.S.A. as portrayed in the cartoon Family Guy he has a deep voice a great laugh, two kids and a wife (his wifes name is "LoRetta" and she says it with an attitude)
also if you were to call someone a Clevland Brown that would be the a more childish or immature equivalent of calling them a nigga'
for instance a mature way of saying it is "Yo! Mug Nigga' whats poppin?"
While an immature dude would say "Hey it's my Clevland Brown sup muh man"
Last night I tackled my girlfriend below the 10 yard line, turned her tight end into a wide reciever and penalized her with a Cleveland Brown..
She promptly retaliated by sacking my quarterback (penis).