On the Internet there is a lot of hack jobs on photoshop. Sites like 4Chan spread a lot of JPEGs like this around. Usually they are photos of celebrities and pop images skewed physically and sometimes text placed inside. Most notably these images are just for humor sake. With so much distortion and ridicule attached to these digital images it falls into my mind caricature.
The image above is just a play upon Robert Pattison from the Twilight film series. All this is criticizing in real time. His eyes and mouth have been shifted and pulled to create a new persona of Pattison as idiocy. The term derp simply is defined as making a dumb comment. I suppose some people did appreciate his panel comments at Comic Con, or maybe it was just a good opportunity for a good laugh.