WordNet
punch bag
n. an inflated ball or bag that is suspended and punched for training in boxing [syn: punching bag, punching ball, punchball]
Usage examples of "punch bag".
Sam hit the punch bag as though he were punishing the entire Ship system.
The ringed hand became a fist, and for the next five minutes Maguire used Ronnie as a punch bag, starting below the belt and working up.
He might hit the punch bag hard at the gym, but he had the natural laziness of any young man in his twenties.