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3.
A master bartender. Also, Mixologist is "The ultimate drink recipe and bartending app" for the iPhone.
Only a true mixologist knows how to pour my favorite cocktail.
by Oregon87 August 10, 2009
 
1.
A wank word for someone who failed university and became a cocktail shaker.
John: I decided to leave university to become a mixologist.

Sam: So you failed and became a bartender.
by 11398787 November 08, 2012
 
2.
a bartender, especially one who specializes in mixed drinks
I'm no mixologist, but I know that a whiskey sour is better with actual lemon juice.
by The Return of Light Joker July 25, 2011