Universal Self-Loading Pistol, in several mods, it is capable of firing 9x19mm, .40S&W,and .45ACP, the H&K USP comes with many faces such as the compact, expert, tactical and many more.
The H&K USP is a very effective firing arm.
by 1337 June 1, 2003
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Un-Shaved Parts/Pussy
I can see that womens USP through her shorts
by yogi ceedee May 14, 2011
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Best pistol in counter-strike
only noobs that are pussy shits use deagle
i pwn'd 4 guys with usp
by --a0a-- February 26, 2003
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(United States Postal Service) The shittiest mail delivery method known to man. When you order from USPS, make sure to add at least a week to the delivery time.
Person 1: Where's my package? I ordered it three weeks ago.

Person 2: Is it coming USPS?

Person 1: Yes.

Person 2: There's your problem.
by TheBestDefinitionMaker October 18, 2015
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USP is a three lettered acronym for 'Ultra Sankt Pauli', a graffitti tag which is possibly related to the St. Pauli football club. The origins of the USP crew are unknown, most likely ex-secret agent ninjas with a penchant for explicit violence and an appetite for destruction. Other graffiti crews possibly have what is referred to as beef over disputed territories and tags being crossed out.

Possible toy(s).
Q1:What does that spray paint on my fence say?
Q2:Who the fuck crossed out my piece?
Q3:Which writers lack artistic expression and skill with their quick tags?
A=USP.
by w82concerned May 15, 2011
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A .45mm Pistol that can hold 12 bullets per clip
by ShinDragonZ April 5, 2003
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A modified version of the Heckler & Koch USP. It is available in either .45ACP or .40S&W calibers. It includes an extended barrel with an o-ring for accuracy and threads for a supressor, adjustable sights, and a match trigger.
The USP Tactical was able to shoot 1.5" groups at 15 yards.
by uspowner April 20, 2006
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