get (one's) ass in gear(redirected from get their asses in gear)
get (one's) ass in gear
rude slang To start being active or prepare to do something, particularly when one is inactive. I know you said you would take out the trash, but get your ass in gear and do it already! I really need to get my ass in gear and finish writing this paper—it's due tomorrow!
get one's ass in gearand get one's tail in gear
Sl. to get moving; to get organized and get started. (Use caution.) Come on, you guys. Get moving. Get your ass in gear!