I work they thighs, and they kegels

from Wiz Khalifa (Ft. Amber Rose, Pharrell Williams & Tuki Carter) – Rise Above Lyrics on Rap Genius

Meaning

He fucks them so hard that they end up getting a thigh and kegel workout.

Here are kegel exercises —

http://www.youtube.com/watch?v=6TLVoU69x_4

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