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1 definition by christmahannukwanza

 
1.
a very dull individual. one who would rather work or do things a normal person would not enjoy doing, instead of having fun.
Josh: "Sam, you should come to my party tonight."
Sam: "No, I'm having dinner with Melissa."
Josh: "You're such a mullygrub."
by christmahannukwanza December 15, 2010