There are plenty of other choices on the table, of course: duff, glutes, buns, booty, rump, caboose, backside, badonkadonk, bum, tail. We'll ignore fanny (in Britain, it means vajayjay), but how about prat? (Yes, that's what a pratfall is.) They all have their charms. But the bottom line? I'm still betting on butt.