Top Definition
Someone that indulges in the world of fantasy, is overweight and believes they are of mystical or sci-fiction power.

adj. a transformer based insult.
Hey optimus-fat, get of your space shuttle there aka the couch and take a shower this week!

did you see optimus fat, he had cat puke on his shirt all week and watched pokemon!
by lord nummers July 10, 2010

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