Confirmed kiwifarms users weren't all raised on sugary garbage: the kool-aid/Gatorade "mustache" was ever-present on the kid down the block who smelled funny and had no dad, and that was indeed the term we used in the dinosaur days of the mid-80s. It looks like this
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Most flavors of Gatorade don't stain but some definitely do. That said, most adults don't end up looking like that adorable scamp because they know how to eat and drink by the time they're grown.
Anyway Luna's doesn't even look like a stain at all because it is a rash.