It stands for "Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism"

Hey, remember the USA Patriot Act? Sure you do. After all, you're an informed, aware citizen attuned to the news of the nation.

Well, guess what boys? The USA Patriot Act is back and it's bad, and it's gearing up for a twelve-city reunion tour. Introducing "USA Patriot Act 2: XTREME PATRIOTISM," apparently now percolating in the damp nether regions of the Justice Department. This bill draft is so patriotic that the paper it's written is reflective red, white and blue, and when you touch it it shoots off a fusillade of miniature fireworks that explode in the rhythm of the song "God Bless America" and destroy any nearby flag burners with powerful hippie-seeking lasers. Hardcore.

--Reposted from Machall.com cause it's a good description