GOATSE

From Ladder Wiki

A common shock site, the images on this site (including the famous GOATSE picture of a man pulling his anus apart with his fingers) are often used in humorous and/or shocking posts, usually in the OT section of the forums. It is a requirement that all not safe for work (NSFW) material be declared as such with the NSFW tag in the thread title. NSFW is a term that is subject to change (but generally includes nudity or other vulgar materials), so it is best to ask a moderator if you are thinking about making a questionable post.

If the NSFW procedure is not followed, punishments up to and including permanent IP bans are possible.