a bad mixer

a bad mixer

1. Someone who is not able to converse easily or pleasantly with other people in a social setting or event. I was worried about bringing my girlfriend out to the party—she's a bad mixer when she's around a lot of people she doesn't know.
2. A non-alcoholic beverage that pairs well with a particular type of alcohol. Let that be a lesson going forward—milk is a terrible mixer with gin.
See also: bad, mixer
Farlex Dictionary of Idioms.

a good/bad ˈmixer

a person who finds it easy/difficult to talk to people they do not know, for example at a party: Whoever we appoint for this position will be dealing directly with our clients. We are looking for someone who is friendly, a good mixer, reliable and practical.
See also: bad, good, mixer
Farlex Partner Idioms Dictionary
See also:
  • a good/bad mixer
  • mixer
  • a good mixer
  • converse
  • converse about (someone or something)
  • mingle with
  • mingle with (someone or something)
  • converse about (someone or something) with (someone or something)
  • converse with (someone or something) about (someone or something)
  • converse with