Definition of bunny ears in US English:

bunny ears

plural noun

  • 1A pair of artificial rabbit ears attached to a headband, typically worn as part of a costume.

    ‘the nurses were decked out in bunny ears for Easter’
    1. 1.1 A hand gesture in which the middle and index fingers are held in a V-shape behind someone's head so as to resemble the ears of a rabbit, typically as a prank while a photograph is being taken.
      ‘family photos that showed his son giving his grandma bunny ears’
  • 2

    ‘we had one TV with a UHF and VHF knob and bunny ears’
    another term for rabbit ears (sense 1)