"Prancersizing" is...exactly what it sounds like. Prancing for exercise. And the looking ridiculous part is just a free bonus!

This kind of reminds me of old rave kids who would dance on x and look like horses prancing around the dance floor. Not to say I didn't party too, but the prancing...no. Plus miss prancy pants probably needs some less tight pants. I can see your pranties! Or maybe she's not wearing any. Prance away lady!