A nitwit who directlinks/hotlinks to graphics or other bandwidth intensive content hosted on your site (and dime) without permission, costing you money every time someone views it on their site with absolutely no benefit to you.
An internet meme that orignated from sega's "Shadow The Hedgehog." In a level cutscene shadow is looking for the 4th chaos emerald and he see's Tails who has the damn 4th chaos emerald.