Noun: An open-mouth smile that shows only the top row of teeth, thereby giving the appearance that the person looks like a cartoon character on a cereal box.

Verb: To cause someone the loss of the bottom row of teeth, through curb stomping or other means.
Tony got a cereal face for felching the sheriff's daughter behind the dumpster at Red Lobster.
by ectofunky August 14, 2011
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The look on someone’s face when they are pretending to like something. Everyone in cereal commercials pretends to enjoy it even though no one really likes cereal that much.
Would you look at her, she has stupid, cereal face.
by Zack the Angry January 18, 2021
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