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A large obese boy/girl who resembles a person with down syndrome. They tends to think of retarded nicknames for themselves in shape of odd intangible things. Also another easy way to spot a Shamoo is to tell a funny joke, if he responds with laughter then he might just be a fat ass, but if he looks into your eyes and rubs his johnson vigorously you might have a Shamoo in the midst.This name can be given to any one that meets the criteria, but is in best use if the names sound similar.
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