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1. flat dick
Term used when describing a person who is idiotic or is useless, kind of like a flat dick would be.
Did you hear what Greg said the other day? He is such a flat dick!
by Josh Dec 9, 2004 add a video
2. flat dick
One who prevents those around him from enjoying fun and/or amusing activities.
Jason: Dan, are you done drinking?
Dan: Yes, Jason, I believe I am.
Jason: Flat dick
by Jason Dec 18, 2004 add a video
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