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A mopey fuck is a person who is always pessimistic and sad about every bloody event in their life. A mopey fuck will constantly act glum regardless of the occasion and often persistently talk about how terrible their life is and will always find a negative to even the happiest of events.

Mopey Fucks are unlike normal realists, despite being miserable about life's misfortunes, they seem to bring them upon themselves by constantly being pessimistic, in fact, they seem to enjoy misery and suffering, despite how much they piss and moan about it.
Person 1: My gosh, it's such an awesome day outside! The sun is shining brightly in the cloudlessly blue sky, a cool breeze is gently rippling the crisp air....

Person 2: All I see is pain and misery...

Person 1: Go piss off, you mopey fuck.
by Leto172010 December 26, 2010
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