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It is simply a roast.
Meaning Your Mother Is Green
Kids in Malaysia use this roast its kind of a signature roast.
by Dat_Boi_Unity February 04, 2017
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Originates from a Youtube video showing a Malay kid showering infinite praise for the cameraman's mother.
(1) Your mother is an environmentally-friendly woman who cares deeply about forest reserves and everything eco-related.

(2) Ur mom green
Ali: Mak kau hitam!
Abu: Mak kau hijau!
by Ali Abu bin Abu Ali May 24, 2018
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