Meaning
A man's undershirt or vest — the cotton, often ribbed, sleeveless or short-sleeved top worn next to the skin under a shirt, or on its own in the heat and around the yard. In Jamaica the word 'merino' is the ordinary name for this everyday undergarment (what others might call a vest or singlet), taken from the merino wool the garments were once made from. A clean white merino is a small mark of a tidy man.
Examples
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Him deh a yard inna him merino.
He's at home in his undershirt.
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Put on a merino unda yuh shirt.
Put on an undershirt under your shirt.
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Di merino soak wid sweat.
The undershirt is soaked with sweat.
Origin
From 'merino' (the wool once used for such garments); a man's undershirt/vest. See [[string-vest]], [[ganzie]].
How it’s used
A man's undershirt/vest worn next to the skin. See [[string-vest]], [[ganzie]].