This definition originates from its debut commercial. It is the equivalent to dumbass.
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A total dumb ass and a complete moron.
you are always sticking your finger in your ass! You are a huge Duma!
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Adj. French name that may be used as an insult because of its similarity with another word.
That Mr. Perkins is such a Dumas
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ok you spelled the word wrongly, dumas!
Dumas spell words wrongly, especially dumas
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