the name commonly referred to the kind gentleman who was present at Moe's Tavern whilst Bart Simpson coincidentally made a phone call there asking for "hugh, last name jazz?" when said out loud and unknowingly the name Hugh Jazz sounds very similar to the phrase "huge ass"
C-Bear and Jamaal-"damn homeboy, that broad has a huge ass!"
(a business man calmly strolls by a stops upon hearing "huge ass")
Man- "Yes, I'm Hugh Jazz, how did you know my name?"
at which point the situation at hand is so funny you cannot help but laugh