go arse over tit

go arse over tit

vulgar slang To flip upside down; to flip head over heels. Used both literally and figuratively. My poor sister just went arse over tit on the ice out there! I hope she isn't hurt! If Bill sells the company, my whole world will go arse over tit—I mean, I'll have to find a new job after 25 years!
See also: arse, over, tit

go arse over tit

fall over in a sudden or dramatic way.
See also: arse, over, tit