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The term used to define a person who is idiotic to the extreme.

A congratulatory term given to a person with the n'th degree of stupidity, the maximum dumb ass.

The term has its beginnings in sayings which are followed by the "to the max" or "to the maximum"
You are the dumbassimus maximus! Congratulations you f-ing dill hole!
by Desyre October 24, 2010