Green’s Dictionary of Slang

jock adj.

[jock n.1 (3)]

1. (US black/campus) of a woman, having an attractive figure.

[US]Current Sl. I:4 2/1: Jock, adj. Having a good figure (applies to females).

2. (US) athletic, sporty.

[US]Atlantic Monthly July 108: Michael Meyer as Brenda’s jock brother, a big, gregarious, simple-minded, good-hearted lug who has exactly the right moves of the athlete.
[US]J. Langone Life at the Bottom 199: We went around cuttin’ all these jock shots out of muscle mags.
[US]E. Leonard Glitz 260: She told him about Tommy’s drinking, his macho jock attitude.
[US]E. White My Lives 234: Goddam faggot, you like paying for this hot jock dick.