Chafing or dermatitis occurring between two folds of skin(noun)
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Use "intertrigo" in a sentence
"It exposed a stripe of her zebra hide, which is the cute nickname we have for the brown and pink intertrigo fungus that lines her torso."
"Babies are frequently subject to rashes, intertrigo, excoriations, eczema, and other skin affections."
"The lesions are more or less numerous, usually become confluent, especially about the folds of the neck, about the genitalia and buttocks; in these regions resembling somewhat erythema intertrigo."