A ridiculously larger-than-life character typically played by a guest star with an Internet Movie Database listing longer than the rest of the cast put together. Full of energy, joie de vivre, blood as hot as the surface of the Sun and poetically powerful speeches with dramatic gestures that can devastate a scene to a billion pieces and transform the most soul-crushingly boring into the most EPIC. Large Hams are a very rich source of Vitamin Memetic Mutation and very often feature in YouTube Poops. Contrast Danger Deadpan, The Stoic, Soft Spoken Sadist, The Quiet One.