The source of all that is evil and wrong on the Internet.

If you've ever seen something on the Internet that made you contemplate suicide (or snap and become a serial killer), it probably came from 4chan--and even if it didn't, you can be sure someone posted it there at some point... and people there LIKED it.
GUY: I just sold my soul to you, so... does that mean I'll spend the afterlife in a bottomless pit of eternal pain and suffering with millions of others just like me?

SATAN: You mean 4chan? No, even I'm not THAT evil. You're just going to Hell.
by Sane People May 19, 2008
An image forum that is, decidedly, outside the realms of good taste (but proudly so). 4chan has generated its own sense of humour that others do not understand or indeed appreciate. Frequenters of the site are typically prouder of it than it deserves, as evidenced by urban dictionary's top-rated answer.
4chan is the sole cause of cultural decline.
by Fourty Seven February 12, 2007
you have just entered the very heart, soul, and life force of the internet. this is a place beyond sanity, wild and untamed. there is nothing new here. "new" content on 4chan is not found; it is created from old material. every interesting, offensive, shocking, or debate inspiring topic youve seen elsewhere has been posted here ad infinitum. we are the reason for "not safe for work". we are the anonymous army. cross us and you will fail. anonymous is everywhere. you depend on us every day. we bag your groceries, we fix your computers. anonymous sees you before you see him. sitting at desks around the world right now is a nameless, faceless, unforgiving mafia composed of the best of the best.

we are 4channers. the people devoid of any type of soul or conscience. products of cynicism and apathy, spreading those very sentiments daily. anonymous is the hardened war veteran of the internet. he does not forgive or forget. we have seen things that defy explantions. heard stories that would make any god-fearing, law abiding citzen empty their stomach where they stand. we have experienced them multiple times and eagerly await their return.

4chan is a place of sheer genius and utter stupidity, and there is often a thin line dividing the two. here you will see a state of mind that exists in most human beings, but is rarely if ever shown. this is a place where taboos do not exist. 4chan cannot simply be regarded as a simple website or imageboard. it is so much more than code. 4chan is alive and constantly changing. this is a subculture, a self-governing sect of the world. rich in history and foundation. to become a 4chan user is to speak a different language. to leave behind any methods of conventional thinking you once knew.

there are things here that you will not understand and things you never will understand. if you cannot accept this then GTFO now. because there is no turning back.
this is 4chan
this is /b/
by Anonymousdoesnotforgive June 1, 2006
The most evil, diabolical, sinister, and ruthless place of the world wide web. The place where people go to bring out their inner evil. The place where things like sympathy and reason go up in flames. Where things like death and sorrow are laughed upon. Where chemistry and physics weep. The Army of Anon, The /b/ tards, The true face of the internet.
Jimmy - "time to go and fap my brains out on 4chan"
by btard9000 November 12, 2009
A meeting place and breeding site for the utter dregs of humanity. A festering polyp in the dieing colon of society.
my god, the people who go to 4chan would frighten even Charles Manson...
by jormungaund April 10, 2008
No lifers' paradise. A cyber place where desperate people who suck at life go to because that's the only place they've got. They depress, obsess and waste what remain of their lives. In front of a computer.
Rob goes to 4chan to gather anime porn and then logs onto his deviantART account where he posts drawing of semi naked anime girls to gain popularity among the cyber geek community.

He also take a shower once in a while.

His geeky hobbies include playing video games, being on the internet and giving thumbs down.

Lives in his room. Wish he was cool.
by YourFriendTheInternets August 7, 2009
4chan.org is the absolute hell hole of the internet, but still amusing. Entering this website requires you leave your humanity behind before entering. WARNING: You will see things on /b/ that you wish you had never seen in your life.
Set "Thanks to 4chan, i now have nightmares of being swallowed by goatse."
by Set Abominae March 15, 2007