A character in the Star Trek: Deep Space Nine episode "In the Pale Moonlight". He is a Romulan
Pictures of him are posted to message boards to indicate that some comment, picture, video, or other material is fake, forged, or otherwise suspicious. The caption "It's a faaaaaaake!" may overlay the image, or the image may stand on its own.
In the episode, when Captain Sisko
tries to trick the Romulans into joining the Federation-Dominion war by giving him a forged recording of a high-level Dominion meeting claiming that the Dominion plans to attack Romulus, Vreenak discovers it is a fake, and angrily announces this to Sisko. The actor's delivery, like a snake spitting the word, meant this was destined to become a meme.
Commenter #1: Check out this cool video lolz <link to obviously fake "VCRs for cash" commercial>
Commenter #2: <vreenak.jpg>