loose cannon 

a) (offensive) an irrational/non pragmatic/behaviorally unpredictable person who is neither under the influence of any drugs/alcohol nor has ADD/ADHD
b ) (sarcastic) a person who does rational and somewhat pragmatic things first without, however, having thought them through properly and then asks intelligent questions regarding his previous pragmatic actions
c) an offensive term for children with, or perceived to have, ADD/ADHD, regardless of whether or not this is truly the case

boy a) my girlfriend is such a loose cannon, and makes the most irrational, non-pragmatic decisions, is there anything I can do?

boy b) are you lol, your girlfriend's social worker or psychiatrist? It may be that she is just a loose cannon according to you, IYHO only and normal to everyone else. and lol, is it possible that you are a loose cannon according to her?

boy a) Dunno and idc if i am a loose cannon according to her. IMHO she needs a few doses of methylphenidate

loose cannon by Uncle Dimma May 4, 2013

loose cannon 

1) Something the police chief calls two cultually different partnerd cops, when he is angy with them and when the police chief has "the mayor on his ass"

2) In an erotic gay movie about police: The thing that the police chief looks forwad too when "has the mayor on his ass"

1) "You two are loose cannons, but your damn good cops!"

2) "I like the two on your loose cannon, let's play good cop, bad cop!"

loose cannon by EmilioEstavezFan#1!!! October 8, 2009

Loose cannon 

A person with the ability to go off unprovoked (usually under the influence of alcohol) at any time, cause disaster at a whim whilst completely unaware of the carnage around them.

He's a loose cannon, he could go off at any time.

Loose cannon by SmokerOfDogs July 23, 2015

loose cannon 

A slut or otherwise trashy girl

Bud 1: Did you hook up with Margo last night?
Bud 2: Easily, that girl is a fuckin' loose cannon.

loose cannon by hoffmannb November 6, 2017

Loose Cannon 

Someone known to fly off the handle at even the smallest obstacles. Usually someone like a Cathy or a Catherine. This type of person can be quite dangerous, and have been known to mow down pedestrians for pleasure.

Did you see that loose cannon? She just ran that dude over for no reason at all, like a real danger in the shadows!

Loose Cannon by acktionjac June 7, 2018

Loose cannon 

A woman who keeps popping out offspring like they are stuck in the 1940's.

Yo, is that the loose cannon's child over there?

That girl keeps dropping babies like a loose cannon drops ammo.

Loose cannon by Deputy Douchebag October 5, 2020

loose cannon 

Someone who gets stuck into the coke on a regular basis and loves to party.

Max the axe is a loose cannon. That cunt needs to be put on a leash!!

loose cannon by getonit November 18, 2009