the website where i saw an infant being medically extracted from a male ass, and people liked it

"allow it" means to just leave something alone, or don't worry about it. People in West London say this quite often.

Peachy hell

Welcome to 4chan
1) Please leave your religion, morals, and opinions at the door.
2)Please note, women are not permitted to enter this site without showing their breasts.
3)Please be advised that adult content is beyond the opening page in a very childish manner.
4)Please be made aware that every sexual fetish ever conjured by the human imagination lies beyond the first page.

The asshole of the internet. Somewhere where nobody wants to be, but still are.

The sphincter of the internet.
Where integrity goes to die.

An image board in which jaded and cynical internet users compete to see who can be the biggest asshole.

Imagery on 4chan ranges from funny and clever, to "shocking" gore and morbid type imagery, to paedophile humour and other inanely retarted crap.

4chan users have invented their own language in an attempt to create a psuedo-culture, much in the same vein as the emo, and the lolcats people. You will typically see words like "Moar" and "newfag" plastered across the boards. Whilst those of us looking objectively at 4chan might think "Stop slaughtering the English language you illiterate fuckhole", such words are apparently used to communicate within this E-community.

Many users of 4chan are passionately defensive about the website, and often praise it as a tight knit global community and place for people to communicate whatever they want, uncensored. Others see it as a chaotic cesspit where people with no personality or ideals can vent uncreative cynicism and pretend they're clever.