An elaborate sexual maneuver requiring preparation. One taps open bags of glitter or confetti to the tops of the blades of a standard ceiling fan. Then, while having sex, one turns on the fan. Thus releasing a shower of festive sparkling glitter on the entire act. (Made better if done after shooting your load on some part of your partner so that the glitter of confetti sticks to them.)
"Man Last night Tom gave Barbie a Glitter Bath. It was beautiful. Just like watching the Titanic."