Trollface

About
Trollface is a black and white drawing of a face with a large mischievous grin that is meant to portray the expression someone makes while trolling. Posting a Trollface image into a forum thread is often used to claim that someone was been fooled or intentionally angered. The face commonly appears in rage comics indicating that the character is being mischievous in some way.

Origin
A MSPaint comic made by deviantArt[1] user Whynne about the pointless nature of trolling on 4Chan’s /v/, was uploaded on September 19th, 2008.