arse; ass; backside; bed; behind; bottom of the inning; bottomland; bum; buns; butt; buttocks; can; derriere; fanny; fathom; freighter; fundament; hind end; hindquarters; keister; merchant ship; merchantman; nates; penetrate; posterior; prat; rear; rear end; rump; seat; stern; tail; tail end; tooshie; tush; underside; undersurface;