MBGITW Share definition Flag An Acronym that stands for "Most Beautiful Guy/Girl In The World". Used most commonly between lovers. Nick: Anji you are the MBGITW Anji: Aw thanks, well you are the MBGITW MBGITW by yogiman03 July 20, 2011 0 0 Get merch Get the MBGITW mug. Buy Now — $32.95 See more merch
