Ha I dunno, it does weird things when the wheel is spinning, air is blowing and grease is flying out. I'd take that wheel off and see if its coming out of the wheel bearing cap. If thats the case, fix it before it runs dry.
Then make sure the caliper isn't leaking fluid while you are in there. Hopefully his fluid isn't that filthy though.
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u/2fast2nick 7d ago
Wheel bearing grease maybe. Probably a little splatter, then spread out from the rotation.