frown upon

He acknowledged it was "frowned upon" for MSPs to challenge the decisions of the presiding officer, but called for clarity over the issue.

These days, political pop is largely frowned upon.

“The conversation is starting to shift, where more and more men are talking about their emotions and leaning into the uncomfortable conversations that historically have been frowned upon and looked at as weak,” he says.

I’m sure in country music it’s frowned upon.

In Zambia, for instance, talking about anything gynaecological is frowned upon.