put/stick two fingers up at someone - definition and synonyms

phrase British informal
  1. 1
    to express anger at someone in a very rude way by holding up your first two fingers in the shape of a ‘V’ with your palm facing you
  2. 2
    to do something rude as a way of showing you do not care what someone thinks

    This is his way of sticking two fingers up at society.

See also main entry: finger