hustle your butt
hustle (one's) butt
To increase one's pace or sense of urgency; to hurry up; to get moving quickly. We'd better hustle our butt if we want to get to the movie theater on time! Hustle your butts, kids! We're already running late!
hustle your buttmove or act quickly. North American informal
Other variants of this phrase include hustle your buns and, in vulgar slang, hustle your ass .