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YGYomiuri Giants (Japanese baseball team)
YGYou Guys
YGYellow Green
YGYouth Group
YGYottagram (mass measurement)
YGYoung Gentleman
YGYankee Group
YGYear Group
YGYoung Green (youth division of the Green Party)
YGYou're Gorgeous
YGYoung Gangsta
YGGarbage Lighter (Self-Propelled)
YGYoung Gunner
YGYaw Gyrocompassing
YGLand-Based Radio Homing Beacon (US Navy)
YGDistrict Lighter, Garbage, (US Navy)
YGYayasan Galatea