Alabama Barker 's got a lot of team spirit ... and, not a lot of clothes -- baring nearly all in a tiny take on an Ole Miss cheerleader outfit!

The model and rapper shared several snaps in a cleavage and tummy revealing baby blue top -- with the Nike symbol on one side of her chest and "Ole Miss" written out on the other side.

She added a tiny skirt and knee-high white boots to the look ... while giving the camera a seductive look from Vaught Hemingway Stadium in Oxford, Mississippi.

Alabama's not alone either ... she's with a few of her friends -- all who are wearing equally revealing outfits, though it seems pretty clear Alabama's the head cheerleader in this situation.

Alabama captioned the post "Ya… #olemiss " before adding people should tune into her live stream tomorrow to wa

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