When something is so shocking/meaningless/senseless/retarded/random/etc, that you're left absolutely speechless.
Joe: Let's see what's good on /b/ today...
Joe: What is this i don't even
Internet meme used to indicate confusion.
Random dude: hey gaiz i jus cught diglet snorlax went boom ate too much kickz lolz
Other dude: what is this i dont even
A popular cyberspace term and joke phrase that is said when someone else utters something totally stupid or useless/senseless.
Jeff: "Hey, Jake, I just went so far as to take the monkey and what what what are you gonna do about that! Jake look at this! Satan! DEATH TO THE WEIRD!"
Jake: What is this I don't even
An phrase used (usually on the internet) when something is so mind-blowingly stupid that you don't even have words to describe it.
Also used to indicate confusion.
Also see wat.
hitler4EVAR114: Has anyone ever been far as decided to use even go want to do look more like?
inoscopedjfk69: what is this I don't even