From WordNet (r) 3.0 (2006):
stacked
adj 1: arranged in a stack
2: (of a woman's body) having a large bosom and pleasing curves;
"Hollywood seems full of curvaceous blondes"; "a curvy young
woman in a tight dress" [syn: bosomy, busty, buxom,
curvaceous, curvy, full-bosomed, sonsie, sonsy,
stacked, voluptuous, well-endowed]