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Mogar is the Metal-Rock Persona of Harold, also known as Billy's father from the T.V. show Grim Adventures of Billy and Mandy in the episode "Battle of the Bands". He lurks in the audience of a Battle of the Bands concert (apparently in a similar attire to that of a KISS band member) and swoops out to attack the winning band. After a loud battle cry, Mogar flies toward the enemy before realizing the physical improbability and crashing down, wrecking the stage. Calling someone a Mogar would be a poser in a sense where it's also acceptable in a funny sense of the word. See clown or idiot.
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