Someone who is a metaphorical tumor on the (usually) great site of YouTube. They make bad videos. A YouTumor usually has a high-pitched voice, and their videos often consist of excessively yelling and/or emoting so as to appeal to a younger and/or less developed demographic. Upon seeing one of these videos, you'll immediately wonder why people purposely choose to watch and support it.
Morgz is a YouTumor.
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