Definitions of mixer:

• noun:   a kitchen utensil that is used for mixing foods
• noun:   electronic equipment that mixes two or more input signals to give a single output signal
• noun:   club soda or fruit juice used to mix with alcohol
• noun:   a party of people assembled to promote sociability and communal activity
• name:  A surname (very rare: popularity rank in the U.S.: #25300)