Green’s Dictionary of Slang

scramble grass n.

(US) marijuana.

1987

(con. c.1967) J. Ferrandino Firefight 119: ‘All we need now is a couple of chicks and a bag of number-one scramble grass. [...] Well, I guess we can’t have everything. But we can get close to a part of it,’ Amaro said, holding up a joint.