Top Definition
A person who has food stuck on their face in a place that could not/should not have resulted from consuming such food.

Also used to describe sloppy eaters or sloppy people in general.

Originated from food fights in which people would attempt to tunaface each other.
F: Wow, Look at all the tunafaces in here
D: Yeah there must've been a good food fight

F: ahah look that emma kid has a chunk of food on her forehead
D: AHah what a stupid tunaface

F: Fuck! why did you throw your tuna sandwich in my face?
D: Haha your such a tunaface
by skeeskeebangbangmuthafucka December 08, 2010

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