Jerks are villains (or occasional villains) who behaves in a very vulgar, rude and unpleasant fashion. While a jerk is mean at times if not almost always, they don't normally mean to cause serious harm to others (especially those that never did anything bad to them). For the purpose of this wiki however in order to qualify the character should be what's known as a "Villainous Jerk" - otherwise they are not valid. Do not place someone who only shows jerky qualities, they must at least be an antagonist.
Good examples for this are Dan from Dan Vs. (as well as many other villains from the aforementioned animated series), Randall Boggs from Monsters, Inc., Gaston from Beauty and the Beast, Dennis Nedry from Jurassic Park, and Syndrome from The Incredibles, overall.