Green’s Dictionary of Slang

well-upholstered adj.

plump, fleshy, fat.

1932		H.R. Wakefield Ghost Stories 44: Mrs. C., a handsome well-upholstered matron, had a shrewd Scottish flair for entertainment, and a flexible faculty for making the right people feel at home .
1939		H. Hodge Cab, Sir? 48: She looks a bit second-hand, though she’s well-upholstered.
1964		in Hamblett & Deverson Generation X 171: I have a preference for dark girls with warm brown eyes and I like them well-upholstered.
1971		E. Lemarchand Death on Doomsday 26: Well-upholstered elderly women [OED].