Green’s Dictionary of Slang

(US black) used to describe attractive female buttocks.

[1884		Sporting Times 13 Dec. 1/1: Chunkey. Yes, you certainly are too fat].
1928		T. Alexander ‘Don’t You Wish Your Baby Was Built Up Like Mine?’ 🎵 Don’t you wish your woman built up just like mine? / She look chunky and squatty, built up from the ground.
1959		A. Salkey Quality of Violence (1978) 123: The women around her heaped themselves closer to her chunky, blowzy body.
1967		P. Thomas Down These Mean Streets (1970) 95: In front of the jukebox was a colored guy and a big, chunky broad.
2000		Ebonics Primer at www.dolemite.com 🌐 chunky Definition: used to describe a fine ass. Example: Damn, I wanna get me a paice of dat chunky booty.
2003		Ludacris ‘Fatty Girl’ 🎵 You got a badonkadonk girl [...] juicy chunky stanky funky.