1 definition by riskit_for_a_bisquit

Top Definition
USP
An Acromymn for "Universal Self-Loading Pistol", manufactured by Heckler and Koch Firearms Company of Germany. Chambered for either .40 or .45 caliber shells. Equipped with a anti-recoil system it is the choice sidearm or many law enforcement and military groups. The Mark23 SOCOM varient of the handgun is the standard issue pistol of the elite NAVY S.E.A.Ls.
You Aint Packin' Heat, Homeboy, Unless You Be Sportin' A USP!
by riskit_for_a_bisquit January 26, 2005

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