noun. A situation or puzzle or predicament that is more difficult than it at first seemed; the opposite of a "no brainer"; something that requires more than one person (i.e. mo' than one brain) to figure out.
Uma thought that the Soduko puzzle would be easy, but it turned out to be a "mo' brainer."
by Erik Patterson February 09, 2006
5 Words related to mo' brainer

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