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1.
One who's badassness exceeds that of most others. Often a skateboarding, jolly-roger flying, partying fool.
Yo Bill, I was driving to work the other day and I saw a street pirate drinking six beers at once while bombing that huge hill on 32nd street!
by LSDrew April 26, 2007
 
2.
A punk rock kid who goes around the streets with nothing to do but cause havoc. Usually calls himself a pirate and dresses in very tight jeans, cut mid-calf and striped shirts.
Did you see the street pirate skate through here and tag that building with his crew's logo.
by Noobish Nick July 24, 2006
 
3.
The Street Pirates are a group from Chicago, IL, who are hell-bent on modern piracy. This includes, but is not limited to: pillaging, destroying, and causing general chaos. The group is considered extremely dangerous, extremely effective, and extremely awesome.

Give 'em ten years, and they'll rule the world.
Dinosaurs kick ass, and so do The Street Pirates.
by Captain Tom September 17, 2005