An arctic finch (Plectrophenax, or Plectrophanes, nivalis) common, in winter, both in Europe and the United States, and often appearing in large flocks during snowstorms
Any finch of the genus Junco which appears in flocks in winter time, especially J
{i} any of a number of birds that inhabit snowy regions (i.e. the junco and the snow bunting); person who travels to a warm climate during the winter (Slang); drug addict who sniffs cocaine (Slang)