Green’s Dictionary of Slang

fry n.

also napfry, skull fry
[fry (one’s hair) under fry v.]

1. (US black) the act of having one’s hair straightened; thus the straightened hair.

[US]D. Burley N.Y. Amsterdam News 16 Sept. 12A: I was keyholding this round-tripper [...] when up stomps a stud with a hard skull fry.
[US]D. Burley Orig. Hbk of Harlem Jive 102: .
[US](con. 1940s) Cab Calloway Of Minnie the Moocher and Me 182: Then everything would be straight, with my fry and my fine vines and my main queen on my arm.
[US]J.L. Gwaltney Drylongso 17: Let ’em learn a little napfrying [...] so they can help themselves when times get tight as dick’s hatband again.

2. (US drugs) crack cocaine.

[US]UGK ‘Hi Life’ 🎵 And you wonder why yo’ niggas out there smokin’ fry.

In compounds

fry daddy (n.) [daddy n. (6)]

(US drugs) crack cocaine and marijuana; a marijuana cigarette laced with crack cocaine.

[US]S. King Stand (1990) 524: She was ‘into’ rock music and marijuana and had a taste for what she called ‘Colombian short rounds’ and ‘fry-daddies’.
[US]S.F. Chronicle 2 July 6: (Factiva) Cocaine sold as free-base is called ‘hubba’ or ‘ready rock,’ they said. When it is mixed with marijuana and smoked, it becomes ‘fry daddy’ or ‘chewy.’ When you go out to buy cocaine, you’re on ‘a tweek mission.’.
[US]ONDCP Street Terms 9: Fry daddy — cigarette laced with crack; marijuana joint laced with crack.
fry (sticks) (n.)

(US drugs) marijuana cigarettes either dipped in PCP or formaldehyde.

[US]ONDCP Street Terms 9: Fry sticks — Marijuana cigarettes dipped in embalming fluid, sometimes also laced with PCP.
N. Kolicki ‘Poachers’ in ThugLit Sept. [ebook] Amp, fry—that's east coast hood rat shit. Blunts drenched in phencyclidine and dried out.