film over
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film over
To begin to display a film, a thin membrane that can develop on the surface of some things. Ew, don't eat that soup—it's been sitting out so long that it's filmed over. Gross, has that pudding filmed over? If you don't want that custard to film over, wrap it tightly with plastic wrap. Don't expose it to the air.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
film over
[for something] to develop a film on its surface. The windows had filmed over because of all the humidity. Her eyes filmed over with the cold.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.