What is jamaican seasoning?

Jamaica is most famous for jerk seasoning, which typically includes scallions, ginger, thyme, garlic, cinnamon, peppercorns, nutmeg, allspice ("pimento") and, of course, Scotch Bonnet peppers. Those ingredients are found, in varying proportions, in other Jamaican dishes, as well.

Technically, of course, those are not all spices. Scotch Bonnets are a fruit, scallions and garlic are considered vegetables and thyme is an herb. Jamaican cuisine sometimes uses turmeric, which is also a spice. You might notice that ginger, turmeric and cinnamon are spices often found in South Asian cuisines--this is not a coincidence, but a result of Jamaican history.

Allspice, which is invariably called "pimento" in Jamaica (and nowhere else), has nothing at all to do with the mild red peppers called pimentos everywhere else in the world. Allspice is a dried berry that is native to the Caribbean and is the single spice that is the most important and characteristic flavor of Jamaican cuisine.