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Some one who is irrevocably dumb.
"Lyke, ammagawd... does this skirt make me look phat?"

"You're 85 pounds you annorexic dummi!"
by The Mistress of Life June 12, 2009
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2
“I’ve been awake for 24 hours. I’m dummi tired.”
by bendy_toe April 15, 2019
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