1. A dildoh of many colors.
2.When a dildoh is inserted into the anus, and is twisted around making colors spinning.
3.When a man ejaculates around the partners anus.
#3 commonly reffered to as a Anal Creampie
Her Bum sparkler is green, yellow, and red. She is so good at working with it.
I let a bum sparkler all on her ass...it looked like i splashed paint all over her ass.