When you stick your hands down your pants after a long day at work or school and you balls have that "ball smell."
After Spiderman 3 i stuck my hands down my pants and rubbed my fingers all over my nutsack and then stuck my fingers under my girlfriend's nose and she puked uncontrollably from the "Ball Smell."
A ballbelly is a term used to describe a very large extremely well rounded male belly. It is shaped like a basketball or a beach ball. It is a term in wide use in Gay Male subculture(s) by Chubs,Chasers, and Bears.
Meaning creative genius. One who is charismatic and posses the ability to energize a room or atmosphere. Has the ability to inconspicuously turning any situation into a positive one.
The room was dead until you walked into the room you just did a Balmelli!