A/N 

Author's note. Used in fanfiction when the author wants to say something about the story

A/N: I wrote this at 4 in the morning, so excuse the bad spelling

A/N by Tanja February 23, 2004

A.N.

Acronym that means "Anal Nympho"

quit acting like an A.N. what the hell is wrong with you.

A.N. by anal nymfoe March 31, 2010

A.N.

Deriving from All-Nighter, it is known as the "drug" that people are effected by after spending an all-nighter. Usually includes saying and doing stupid things, which one will most probably not remember when one wakes up.

Jo's Mom: Hey Honey, where do you hide your weed?
Jo: Umm its in my "To Kill A Mockingbird" book..
--That Afternoon when Jo wakes up--
Jo: Hey Mom.
Jo's Mom: You're grounded, but thanks for telling me where you hid your weed and being honest about it.
Jo: Fuck, I must have been on A.N., FML.

A.N. by mysteryman2456 April 10, 2010

A.N.

meaning absolutely nothing. To be sitting around the house either watching TV or internet browsing. To be essentially accomplishing nothing.

Ashley:Hey what's up?
David:A.N.
Ashley:You really need to start being more productive, like take up a sport or something! Stop sitting around on the internet all the time!

A.N. by Mr. Reifert August 20, 2006

A.N.C.M. 

The term used by pilots in emergency situations to describe the priority of actions.

The flight instructor informed his student that the acronym A.N.C.M. which stands for: Aviate, Navigate, Communicate, Masturbate should be the order of priority in an emergency situation.

A.N.C.M. by green923jade May 1, 2017

A.N.U.S. 

The American Nihilist Underground Society.

A.N.U.S....a website for anyone interested in philosophy and/or extreme metal.

A.N.U.S. by LizzieLulz February 6, 2009

A.N.S.

A disease that strikes one in a billion people. Very rare, very dangerous. Can cause uncontrollable fits of various emotional mood swings, even giddyness and fits of laughter.

Commonly untreatable, but in rare situations leaves the patient with no symptoms but an upset stomach from laughter.

These people have come down with A.N.S.

A.N.S. by MR Reddd December 3, 2009