kick in the seat of the pants

kick in the (seat of the) pants

and kick in the ass and kick in the butt and kick in the teeth and kick in the rear n. a strong message of encouragement or a demand. (Usually objectionable.) All he needs is a kick in the seat of the pants to get him going. A kick in the teeth ought to wake them up and get them moving. See also: kick, of, pant, seat