Cupcake: young girlish boy, though not necessarily gay …
cupcakes; small but rounded buttocks, most temptingly found on narrow
hipped boys. Syn: English Muffins; hone rolls; hot cross buns;
rounders. “Ask that kid with the rounders if he’d be interested in
joining in an ancient Greek initiation rite.”
Source: http://www.wnd.com/2000/11/3081/