Meaning
A texting abbreviation for 'kiss mi teeth' — standing in, in writing, for the long sucking-teeth sound of contempt, annoyance, or dismissal. Typing 'kmt' after a message conveys that you are sucking your teeth at it, the written form of the classic Jamaican gesture.
Examples
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Him seh him nah pay mi back. kmt.
He says he won't pay me back. (sucks teeth)
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kmt, dem people love chat.
(sucks teeth), those people love to gossip.
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She just reply 'kmt' an lef.
She just replied 'kmt' and left.
Origin
An initialism of 'kiss mi teeth', written to convey the suck-teeth gesture in text/chat; also 'kml' (kiss mi teeth loud). See [[kiss-teet]].
How it’s used
Texting shorthand for the suck-teeth sound of contempt. See [[kiss-teet]]. Compare 'dwl'.