N.A.
NA (said 'N-A') stands for not acceptable. It is mainly used as an
interjection or adjective to describe things that are not
socially acceptable, or actions that are weird,
bizarre, or simply inappropriate in a give situation.
That guy just
smacked my ass.
N.A.!
Ugh. Look as those two making out during class. N.A.!
It is so
NA for you to wear that outfit tonight.