no-no

Erykah Badu Erykah Badu began her set nearly half an hour after its scheduled start time — a serious no-no at a festival with a tightly programmed live stream — and consequently found her sound cut after only about 20 minutes of music.

He once got in trouble for bowing to a company executive with his hand in his pocket, a major no-no in Korean culture.

Websites materialized for buying them across state lines, a no-no for licensed weed.

Another big no-no is showing up to work or events when you’re sick.

Guto Harri, a former Downing Street director of communications under Boris Johnson, told BBC Radio 5 Live's Matt Chorley that being paid more than your boss at No 10 was "basically a no-no".