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1.
Term used primarily in the hip hop community to describe the Desert Eagle .50 cal handgun. Fully loaded, the Desert Eagle weighs approximately 4 pounds. This term is often wrongly used to describe a wide range of 9mm or .45 cal handguns which weigh much less than 4 pounds relatively. For instance, a fully loaded Glock 17 weighs 31.91 oz, just under 2 pounds.
"...guzzlin beers, we all stare at the outta-towners, they better break north before we get the four pounders, and take their face-off..." -Nas
by Scrappy McTissue February 04, 2009
 
2.
a .45 cal gun
cap u wit a four pound
by b August 06, 2003
 
3.
The term "four pound" refers to a .45 caliber handgun literally meaning four plus a pound.

i.e. four---->(4) pound---->plus a pound(4+1=5) = 45

Desert Eagle .50cal??? Are you kidding me? NO! It means a .45.
Fuck a 9 or .40cal you need a four pound if you wanna really put a hole in a mother fucker.
by I_Go_Full_Retard January 20, 2012
 
4.
most any firearm , It takes four pounds of pressure to pull most triggers
yo, grab your vest and the four pound
by CAPS360 November 01, 2007
 
5.
It's what happens when you get raped by a dirty hooker and you get a rash on your nipples or balls.
billy: dude i walked home from tommy's last night and this skank ran out of the alley and raped my genitals.

tony: its all good billy, i had a four pound last week and my balls are smooth as eggs.
by bennypotsmoker March 05, 2007
 
6.
a nine millimeter, they all weigh about four pounds.
"I held the four pound steel in my hands thinking about what i had done"
by brad April 07, 2005