hustle (one's) butt
To increase one's pace or sense of urgency; to hurry up or 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 butt
move or act quickly. North American informal Other variants of this phrase include hustle your buns and, in vulgar slang, hustle your ass .