frown on
Intermediate (B1)neutral
To think something is wrong or bad, especially a behaviour, and not approve of it.
"In many offices, using your phone during meetings is frowned on."
Hear it in context

The Blueprint: How Kountry Wayne Became a Digital Mogul | SWAY’S UNIVERSE
SWAY'S UNIVERSE · 34:14
Like frown on that.

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While they didn't frown on fraternization,

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Jay Shetty Podcast · 13:30
walking alone with a frown on your face

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NoirCast · 334:52
This quickly brought a frown on Jeffrey's face

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I walk around with a frown on my face.