When your girl or side hoe takes a cup of confetti and has you cum in it and then puts it in her mouth. After that she engulfs your scrotum and continues to gargle on it until the sticky confetti sticks on to you giving the appearance of a disco ball.
After a fine lady has just given you a wonderful BJ, she spits a little of your load onto your sack, then dusts it with glitter. Then you dim the lights, throw on a little Bee Gees, and perform the no pants dancelike it was 1975.
"Dude, Brenda gave me The Disco Balllast night, and she couldn't stop herself from dancing to my sparkly sack."
An undercover method of describing a bitchy person. Can be used directly to their face if they don't know the term.
Much like an actual disco ball obnoxiously reflects light in all directions, a "shiny disco ball" feels the need to display their douchbaggery attitude to everyone around them.