lmm Share definition Flag The initials of popular actor, singer, and playwright, Lin Manuel Miranda. He is best known for his work on Hamilton, Moana, and In The Heights. Person1: I love LMM! Person2: Who is that? Person1: Lin Manuel Miranda, of course! lmm by Gourtiom June 11, 2018 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug