You shimmy your hips to make your bottoms drop.
From Create Your Own Story
Status: Naked & Sexy
Looking out at the sea of faces and phones watching you, you decide to put a little more shake into your hips. It quickly has the desired effect: your bottoms come loose enough to fall off, pooling at your ankles. You're now completely naked, your tight ass and bald pussy are fully exposed to the crowd of strangers.