1. jazzercise - Noun
2. jazzercise - Verb
English Wikipedia has an article on:jazzerciseWikipedia
jazzercise (uncountable)
A form of aerobic exercise based on jazz dance.
jazzercise (third-person singular simple present jazzercises, present participle jazzercising, simple past and past participle jazzercised)
(intransitive) To perform this kind of exercise.
So that's why, out of nowhere, I have Lin-Manuel Miranda doing Jazzercise in my dreams. Source: Internet