Green’s Dictionary of Slang

heads n.

1. (US black) one’s children.

[US]‘Touré’ Portable Promised Land (ms.) 161: We Words (My Favorite Things) [...] Heads. Hip. Hot.

2. (Aus. drugs) marijuana [the heads of the marijuana plants].

[NZ]A. Duff One Night Out Stealing 30: A massive celebration party with half a k of dope, heads a course, piss coming out our ears.
[Aus]L. Davies Candy 72: I was eighteen, nineteen, twenty years old, and selling lots of hash and heads.