Green’s Dictionary of Slang

jock v.1

[jock n.1 ]

1. [late 17C–early 19C; 1960s+] to have sexual intercourse.

2. [1960s+] (US) to engage in athletics.

3. [1970s] to be lively and have a good time.

4. [1980s+] (US black) to imitate, to irritate (cf. on someone’s jock(strap) under jock n.1 ).

5. [1980s+] (US black teen) to idolize, to pay someone lots of attention, trying to impress them.

In phrases

jock someone’s style (v.)

[2000s] (US black) to imitate.