also: エヌジー
no good; not allowed; unacceptable
Colloquial term used to reject something as not meeting a standard, often in media production, quality checks, or casual conversation.
This take is no good. Let's shoot it again.
outtake; blooper; retake
Used in film, TV, or recording contexts for a rejected take, often shown as a blooper reel.
A blooper reel was shown at the end of the program.
Taking photos is not allowed without company permission.
Being late is not allowed.
He kept flubbing his lines and messed up several takes.
Let's check beforehand what behaviors are off-limits in an interview.
They showed the blooper scenes at the end of the program.
禁止 specifically means "prohibited" by rule, while ＮＧ more loosely marks something as unacceptable or a mistake.
Abbreviation of English 'no good', adopted into Japanese as a colloquial term.