Longman Dictionary of Contemporary English - mixer

~ n 1 a piece of kitchen equipment used to mix flour, sugar, butter etc together  (an electric food mixer) 2 a drink that can be mixed with alcohol, especially to make a cocktail  (We can use tonic water or orange juice as mixers.) 3 a good/bad mixer someone who finds it easy or difficult to make friends with people and talk to strangers 4 someone whose job is to control the sound when making a record or tape of a piece of music, or to control the quality of the picture when making a film 5 AmE old-fashioned a party held so that people who have just met can get to know each other better  (Are you going to the freshman mixer?)