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1.
An elite, in everything(gaming,sports anything else that has to competing, ect. ect.) . Translated to "gangster".
Hey look, brandon is a gundal.
by Big B June 22, 2003
 
2.
Means a gangster in Korean. Same as Jopok, but less formal.
Better not fuk wit him. He's a gundal.
by Korstah October 23, 2003