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.
Taking photos is not allowed without company permission.
Being late is not allowed.
A blooper reel was shown at the end of the program.
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.
OK means something is fine or approved, the direct opposite of ＮＧ meaning it is rejected or not allowed.
Abbreviation of English 'no good', adopted into Japanese as a colloquial term.