Johnny Cage means in slang: Jean-Claude Van Damme is the basis for Mortal Kombat’s popular Mortal Kombat character. He is a comic relief character known for his wacky humor and lack of fighting skills. He was originally designed to be a homage to Frank Dux, Bloodsport’s character. Later, his design was modified to ensure that he always wore sunglasses to make him look Hollywood. (in Slang Dictionary, added by Joaquín Pastor)