Chub Rub - What does chub rub mean?

Chub Rub is slang for "Chafing where your thighs rub together." See an example of how people use it.
Chub rub is the chafing, rashes, or bumps that sometimes appear in the area where a person's thighs rub together. While chub rub more commonly occurs in larger or overweight people (thus the name), most people have felt the sting of chub rub at some point in their lives.

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