fond du lac girl means: Fond du Lac girl. Primarily, she is a native..she was raised and born in Fond du Lac. A Fond du lac girl can be identified by her unattractive hairstyle, poor clothes and bad makeup. Due to smoking and drinking, she looks 10-15 years younger than her real age. She thinks it’s a great time to go to Dillingers Main Street, dance to old music and pretend she is hot. Fond du Lac girls love to date men wearing mullets and no fear gear. This is considered the most insulting thing. (in Community Dictionary, added by Wesley Bright)