roster, n. — Green’s Dictionary of Slang

roster n.

[SE roster, i.e. something tht occurs at preordained time]

(S.Afr. drugs) withdrawal symptoms.

2006		Mail & Guardian 21 Apr. 🌐 The withdrawal symptoms — the roster — include acute back pains, joint pains [...] sweating, goose-bumps [etc.].
2006		Mail & Guardian 21 Apr. 🌐 Soon I was only smoking for the roster [...] The roster, like clockwork, kicks in almost every four hours.