Meaning
Slippery or slimy — hard to grip, like a wet rock, a bar of soap, or cut okra. Beyond the literal, to call a person 'sipple' is to call them slippery in character: sly, evasive, hard to pin down, and not to be trusted. The word thus runs from the plain danger of a sipple stone underfoot to the sharper warning about a sipple character who wriggles out of every hold, both senses sharing the idea of something that slides from your grasp.
Examples
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Di rockstone sipple, mind yuh slip.
The stone is slippery, mind you don't slip.
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Di ochro mek di pot sipple.
The okra makes the pot slimy.
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Watch him, him sipple like eel.
Watch him, he's as slippery as an eel.
Origin
From English 'supple' (pliant, smooth), shifted in Jamaican to mean slippery and slimy.
How it’s used
Literal for wet, slick surfaces; figurative for a sly, slippery person who can't be pinned down.