MUG may refer to:

• Macintosh User Group

• Marxist Unity Group, an Orthodox Marxist caucus within the Democratic Socialists of America.

• MUMPS User Group

• Meet-up game, a term for pick-up game

• Multi-User Game, another term for multiplayer video game

• 4-methylumbelliferyl-beta-D-glucuronide, a substrate used in the GUS reporter system

• Double-stranded uracil-DNA glycosylase, an enzyme

• The Medical University of Gdańsk in Poland

• Male Un-bifurcated Garment, a technical term for men's skirts

• IATA airport code for Mulegé Airstrip, near Mulegé, Baja California Sur, Mexico

• Mug Root Beer, sometimes referred to as MUG

See also

• Mug (disambiguation)

• Mugging (disambiguation)