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