Big Boy (born Kurt Alexander; September 8, 1969) is a nationally syndicated American radio host and actor. His stage name derives from his formerly large build, which he modified through duodenal switch surgery in 2003, leading to a nearly fatal weight loss of over 250 pounds.

He became famous as the literally larger-than-life Big Boy working as a 400-pound bodyguard for hip-hop group The Pharcyde when he began his radio career in 1994 at KPWR/Los Angeles. His comedic and conversational skills led to success with overnight and afternoon shows before KPWR (Power 106) asked him to host the station’s morning show in 1997. The result was Big Boy’s Neighborhood, a show that combined hip-hop music, celebrity guests, Hollywood gossip and prank phone calls (performed by alter ego Luther Luffeigh).