Green’s Dictionary of Slang

sulph n.

[abbr.]

(drugs) amphetamine sulphate.

[UK]N. Barlay Curvy Lovebox 29: I get a little rizla of sulph off Nood [...] to keep me goin’.
[Scot]A. Parks May God Forgive 90: I’ve got black bombers, sulph, mandies, couple of tabs left—’.