Green’s Dictionary of Slang

chewy n.1

[? one chews at it as one smokes]

(US black/drugs) a cigar or marijuana-filled cigar, rolled with cocaine powder (rather than crack).

Luniz ‘Dict.’ at [Internet] Chewy’s: Blunts Wit Powdered Coke In It.

In phrases

do the chewy (v.) [? one gnashes ones teeth/chews one’s lips; ? the character Chewbacca or Chewie from the Star Wars films]

(Aus.) to become angry.

[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 23: Chewy (Do The) Become angry.