(India, Hong Kong) A type of plaster made from lime and sand, used for indoor finishing and slope protection.
1808–1810, William Hickey, Memoirs of a Georgian Rake, Folio Society 1995, p. 226:
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(transitive) To plaster or waterproof with chunam.
The Sydney Morning Herald, Wednesday 8 March 1848
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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