A hippiepotamus is a fat kid whos a hippie.
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A hippiepotamus is just a random stupid name you call kids with long hair (e.g. Skaters are examples of hippies. They are the worst part of the hippies... the physical assets. They lack the spiritual beliefs, but they look like hippies.)
Noun. A process in which a person shoves an umbrella in his or her anus, and then promptly opens it up, thus making his or her asshole larger. The misguided soul then proceeds to put watermelon-sized anal beads into his or her rectum. This being must then try to regurgitate these objects into a friend's mouth. Finally, the friend runs to the nearest zoo naked and gets impaled by a rhinoceros.