look up any word, like cleveland steamer:
 
1.
a slang term used for when ever one gets a black ice monster slurpee in a 40oz cup.also know as 4awty or the green shizzle.

Craig: Lets go gets sum 4awtysz!!!

jimbo: wtf is a forty?

Craig: a liquid in which ur shit becomes green sun.

by N of n0v3mBer January 26, 2009
 
2.
forty ounce bottles of liquor
We could go and get forties. Then we'd go to some party. Oh really? Your folks are away now. Alright lets go. I'll be right there. -12:51-The Strokes
by drewandfabfan February 23, 2004
 
3.
Any forty ounce bottle of alcohol. May be used to casually refer to any .40 calibre firearm.
Sawed off shotgun / hand on the pump / left hand on a forty / puffin' on a blunt
by T.D. January 20, 2003
 
4.
plural form of forty, referring to several 40 ounce bottles of liquor.
yo, let's stop by tha 7-11 and get some forties and roll to tha partay.
by bud newman. February 28, 2003
 
5.
The number one greater than thirty-nine and one less than forty-one.
When no one was looking, Lex Luthor
took forty cakes. He took 40 cakes.
That's as many as four tens.
And that's terrible.
by JamesBCrazy December 19, 2013
 
6.
Any of a variety of 40 ounce malt beverages.
Hey i wonder if that bum has drunken any forties lately
by ill bill December 23, 2002
 
7.
A large quanity of malt liquor 40 ounces, usually sold in the ghetto, bario, trailer park or any other ecomincally depressed area.
I knocked back a 40 of the Eight Ball right before I pimped dat ho.
by Pimp Logan618 August 03, 2003