Meaning
A jinx brought on by saying out loud that something bad will happen — as if your words, like a goat eating up everything, spoil the outcome. To 'put goat mout pon' something is to jinx it by predicting failure; when the bad thing then happens, people say the speaker 'goat-mout it'. A firm piece of Jamaican folk belief about the power of the tongue.
Examples
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Nuh put goat mout pon di trip, man!
Don't jinx the trip by predicting trouble!
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Yuh seh him woulda lose, an him lose — yuh goat-mout it.
You said he'd lose, and he lost — you jinxed it.
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Mi nah say nuttn, mi nuh want goat mout it.
I'm not saying anything; I don't want to jinx it.
Origin
From 'goat' + 'mouth'; the image of a goat's spoiling bite applied to jinxing words. See [[bad-mind]], [[bad-eye]].
How it’s used
To jinx something by speaking bad outcomes aloud; 'put goat mout pon'. See [[bad-eye]], [[bad-mind]].