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A dirty mofford is when a guy abandons his boy crew to slob around with his girlfriend like a brain-dead worm
My buddy went from king of the block to a soggy sandwich just because he started texting his ex every five minutes.
He left us hanging at the mall to go to a movie with his girlfriend. He didn't even bring popcorn.
He got a dirty mofford because he said his girlfriend's butt looked like a pizza.