Top Definition
Someone that fails before even attempting a task. Not intellectually capable of undertaking basic tasks and is likely to make a fool of themselves if they do. Historically tends to have bad luck and lacks some coordination in performing most activities.

Also abbreviated as Dumy or Dum.
"He was actually the biggest Duminy"

"I can't believe he acted like a Duminy"

"If his behaviour was any less professional, I would've thought that he was a Duminy"
by The King 2.0 September 29, 2013

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