Possibly from Italian casa (“house”), via 1870s Cockney word carsey, and possibly via Polari and Sabir
Or a contraction of "Gazebo"
Possibly from an African language (Zulu or Swahili are often cited) word "M'khazi" meaning a latrine.
khazi (plural khazis)
- (UK, slang) A toilet.
Particularly used in "down the khazi".
Khazi is now most commonly used in Liverpool, away from its cockney slang roots.
- ^ A dictionary of slang and unconventional English, by Eric Partridge et. al., 8th edition, 2002, p. 185
- ^ Alan D. Corré, "Polari Words from Lingua Franca" in: A Glossary of Lingua Franca, 5th Edition, 2005
- ^ "Why Do We Say?" (1987) by Nigel Rees