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The act of supplying McDonald's with the white sauce from your armpits. Classic symptoms are excessively wearing white T-shirts and people avoiding you when you lift your armpits. Also Mayonnaise Perspiring Syndrome or MPD/MPS.
Dude 1: That guy in front of us has Mayonnaise Perspiring Disease !

Dude 2: How do you know?

Dude 1: He's wearing a white T-shirt everyday.
by PikachuKnowsSurf December 30, 2009
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