get your arse into gear

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get (one's) arse 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 arse in gear and do it already! I really need to get my arse in gear and finish writing this paper—it's due tomorrow!
See also: arse, gear, get

get your arse into gear

begin to move or take action, especially belatedly; hurry.
See also: arse, gear, get