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The 4chan party van is another name for the FBI truck that 4chan users usually see out side their house when they post or talk about Child Pornography.
Other 4chan users use it as positive term rather than a negative one. They say it will take them away to the internet where they can live happily will small children forever. This is a lie and is only mentioned by FBI agents.
Guy1: Hey guys, here's some CP!
Guy2: Dude that's not cool.
Guy1: Uh oh, the 4Chan Party Van is outside my house! They're coming in!
Chris Hansen: Why don't you take a seat?
by Bobnonymous April 15, 2008
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1. noun The people who come after you when you post child porn on 4chan.
2. adjective Used when describing the people who go after you for doing bad things.
1. Bitch: Hey, where's Dave and his neighbor's kid?
Whore: The 4chan party van took him away. The kid's safe now.

2. Bitch: Did you see those bitches who took Dave to court?
Whore: Yeah, they were some 4chan party van type fuckers...
by Ryssy November 18, 2007
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