What Has Been Seen Cannot Be Unseen — Black cat with huge startled eyes, captioned 'What has been seen cannot be un-seen'

What Has Been Seen Cannot Be Unseen

2004catchphraseclassic

Published October 5, 2026

What Has Been Seen Cannot Be Unseen is an internet axiom about the mental residue of looking at a disturbing image. The phrase surfaced in a 2004 blog post by Joey deVilla about Goatse, then spread through shock-site forum threads before anchoring a wide-eyed cat demotivational poster that pushed it into standard forum shorthand.

catchphrase memes shock humor memes reaction memes forum era memes mid 2000s memes

Overview

The axiom works as a wry warning aimed at anyone who just clicked something they shouldn't have. Users typically pair the phrase with shock sites like Tubgirl and Goatse, or with 'when you see it' photos where a hidden detail ruins an otherwise ordinary image1. Its best-known visual form is a demotivational poster showing a wide-eyed cat with the line as caption, which pushed What Has Been Seen Cannot Be Unseen into general forum vocabulary around 20074.

The tone sits between genuine lament and self-deprecating humor. Posters use it to warn others before linking NSFW content, to react to an image they wish they had scrolled past, or as a blog tag for anything visually off-putting4. Know Your Meme groups it with the related reaction phrase 'when you see it, you'll shat brix,' both aimed at the moment a viewer notices something they can't un-notice4.

Origin & Background

Platform
Personal blog (Joey deVilla) / Forums (viral spread)
Creator
Joey deVilla
Date
2004

The exact wording 'cannot be unseen' shows up early in a quote by Canadian cartoonist David Sim, which was circulated as an inspirational line on quote sites2. Its first use tied to a traumatic online image belongs to Joey deVilla's December 15, 2004 personal blog post titled 'Some Images, Once Seen, Cannot Be Unseen,' written about Goatse1. That post is the earliest documented pairing of the phrase with shock content4.

How It Spread

Shock-site culture carried the phrase forward. On November 3, 2005, a Tribe Magazine forum thread about Tubgirl used it as a reaction3. On September 24, 2006, an eBaum's World forum thread invited users to share images they could not erase from memory, and the line kept appearing in replies5. By 2007, the saying was common on forum boards, boosted by a demotivational poster of a wide-eyed cat captioned with the phrase.

On September 17, 2007, it appeared in an inCrysis gaming forum thread describing a user's first impression of 4chan6. Later that month, Neatorama commenters applied it to Tubgirl again7. In September 2009, the single-topic blog Can't Be Unseen launched, dedicated to curating image pairs that revealed a hidden design flaw or embedded imagery8.

By 2010, 'cannot be unseen' worked as a tag across the Daily What, Geekologie, Blame It On The Voices and Tumblr4. In 2011, Buzzfeed published '21 Things That Cannot Be Unseen,' turning the phrase into a listicle framing device and locking What Has Been Seen Cannot Be Unseen into general internet vocabulary9.

Timeline

2004-12-15

Joey deVilla publishes 'Some Images, Once Seen, Cannot Be Unseen,' a blog post about Goatse that is the earliest known use of the phrase in a shock-image context.

2005-11-03

The phrase appears in a Tribe Magazine forum thread about Tubgirl.

2006-09-24

An eBaum's World forum thread asks users to share images they can't forget, bringing the line into wider forum use.

2007-09-17

An inCrysis gaming forum thread uses the phrase to describe a first visit to 4chan.

2009-09

The single-topic blog Can't Be Unseen is registered, dedicated to juxtaposed image pairs.

2011

Buzzfeed publishes '21 Things That Cannot Be Unseen,' spreading the phrase into mainstream listicle format.

Frequently Asked Questions