Meaning
To love up — to cuddle, hug, and show affection warmly; to be cosy and doting with a partner or a child. 'Dem a love up' means they're being affectionate together. Tender and playful, part of the vocabulary of care.
Examples
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Dem deh inna di corner a love up.
They're in the corner cuddling.
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Come mek mi love up mi baby.
Come let me cuddle my baby.
Origin
How it’s used
To cuddle/show affection warmly.