Many of his stand-up acts are impressions of his father.
Jeff got the comedy in him from his father.
Jeff is also a practicing psychotherapist.
Jeff's a certified leader of the ManKind Project, an organization that helps men with life issues.
Jeff first major screen credit was Doin' Time in 1985.
Jeff's trademarks are voices, mugging and physical antics.
Jeff's family says that he was born wacky.
Jeff and his wife have one daughter together.
He was a spokesman for Arby's restaurants in the mid-80s.
Jeff is a drummer and has been a long time fan of Buddy Rich.
He graduated college from Johns Hopkins University.
He graduated high school at Nottingham Senior High School.
Jeff played third singles on his high school's tennis team.
Jeff has appeared on The Late Show with David Letterman 37 times.
Jeff married Leslie Ackerman in 1979.
Jeff is 5 feet 8 inches tall.