Green’s Dictionary of Slang

charas n.

also chearris, churrus, churus
[Hind. charas, hashish]

(drugs) hashish.

[[US]Harper’s Mag. Apr. n.p.: The churrus of Herat, which is one of the most powerful species of the narcotic, is obtained by pressing the plant in cloths].
[UK]E. Murphy Black Candle 332: The hemp resin for smoking and chewing comes in three forms – chang, ganja and charas.
[US]A.J. Pollock Und. Speaks 20/1: Charas, an inexpensive substitute for opium made principally from mariahuana [sic] and aromatic drugs.
[[UK]E. Stanley ‘Marihuana As A Developer Of Criminals’ n.p.: In India, the resinous substance which exudes from the flowering head of the female plant is called ‘chearris’, and is either smoked or taken in pills or in confections].
[US]J.E. Schmidt Narcotics Lingo and Lore.
[US]R.R. Lingeman Drugs from A to Z (1970).
[UK]‘Hassan-i-Sabbah’ Leaves of Grass 21: The highest grade of charas is about the strongest hash going [...] Charas is the resin of carefully selected female plants, scraped only from the upper leaves.
[UK]S. McConville ‘Prison Language’ in Michaels & Ricks (1980) 525: Cannabis is also known to prisoners by the names given to it in the different places in which it is cultivated: charas (India), [etc.].
[US]ONDCP Street Terms 5: Charas — Marijuana from India [...] Churus — Marijuana. [Internet] Charas is the hand-rolled hashish of India and is an integral part of the country’s ancient culture.