LGM

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LGM may refer to:

• Lady International Correspondence Chess Grand Master
• Lao Gan Ma
• Last Glacial Maximum
• LGM (film) or Let's Get Married, an Indian Tamil-language romantic drama film
• Libre Graphics Meeting
• Little green men, a stereotypical portrayal of extraterrestrials
• Little Green Men Games
• Let's Go Mets, a common chant at New York Mets baseball games