When a person can't handle spicy food.
"This jalapeño popper is too hot. It burns!"
"You have serious white girl mouth."
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Extreme hunger to the point ur mouth gets dry and lips chapped..
Extreme anger to the point where u foaming at me mouth while you scream ur point across..
Crazy.
U So hungry Ur look white around the mouth..
When someone gets a job because they do oral favors for a superior.
Johnny was White Mouthing to get his higher paying job.