Percolate anyting you want to call it
This particular line is actually an extremely creative and intelligent line, commonly overlooked by listeners. Percolate is a scientific term which in basic explanatory form means when a liquid, like water, gradually passes through a surface usually with pours (like in your skin) but can also be used as a term with other materials. An example which can be taken from this particular Sean Paul line is when a woman gets sexually aroused, as it results in a liquid passing through the pours of her skins to the surface.
Or you know, when coffee itself is strained away from the beans when making coffee with a machine.
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