1796, of hay, past-participle adjective from stack (v.). Of women, "well-built physically; curved in a way considered sexually desirable," 1942.
Entries linking to stacked
stack v.
early 14c., "to pile up (grain) into a stack," from stack (n.). Meaning "arrange (a deck of cards) unfairly" (in stack the deck) is first recorded 1825. Stack up "compare against" is 1903, from notion of piles of poker chips (1896). Of aircraft waiting to land, from 1941. Related: Stacked; Stacking.