Green’s Dictionary of Slang

teabag n.2

(N.Z. prison) a marijuana cigarette; marijuana, thus teabags marijuana.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/2: teabag n. 1 a cigarette containing marijuana 2 (teabags) marijuana [...] teabag king an inmate with no marijuana or tobacco, reduced to smoking tealeaves instead.

In compounds

teabag king (n.)

(N.Z. prison) ironic ref. to an inmate who, lacking tobacco or marijuana, is forec to smoke tealeaves.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/2: teabag king an inmate with no marijuana or tobacco, reduced to smoking tealeaves instead.