Jonathan Mortimer Smith (born January 27, 1971), better known by his stage name Lil' Jon, is an American rapper, hype man, an producer. He is best known as a pioneer of the sub-genre of hip hop known as "crunk" (a combination of elements of Bounce Music, Disco music, Southern hip hop and bass music). His group, The Eastside Boyz, which includes Big Sam and Lil Bo, is one of crunk's most notable acts. He is also a prolific producer for other groups, and frequently makes guest appearances.