Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym MGGM is...

MGGM is

  • Maternal Great Grandfather

MGGM is also in:

Acronym Definition Searched: ATP 48127 WO 24328 PET PR2 SUL GURPS 48095 MAPE TP TESAR TIA TBI 08008