Green’s Dictionary of Slang

movies n.

1.

2. (N.Z. prison) psychedelic drugs, e.g. LSD; thus go to the movies, to take such drugs.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 119/2: movies, the n pl. 1 LSD 2 Magic Mushrooms. go to the movies to take such drugs.