Top definition
One who, well-endowed, engages in the act of anal sex, thereby leaving the receiver of the action "beaten out-of-round" in the backside.
Carla couldnt walk too well after big John got through with her. He's a real duke buster.
by bosshog27613 May 12, 2009
Get the mug
Get a duke buster mug for your sister-in-law Helena.