One who has to compensate for their lack of skill by subjecting themselves to tremendous amounts of effort, especially in the areas of academics and athletics. Most "try hards" often fail in their attempts at success and therefore exists in a constant state of self-apathy and extreme stress. It should be noted that "trying hard" at something is not at all dishonorable. Therefore, one should note the distinction between "trying hard" and a "try hard".
Try Hard: How long did you study for that test?
Intelligent Student: Just a moderate amount of time, an hour or so, but I got a A-, so I'm satisfied.
Try Hard: What!? I studied for four hours and made a C+!