The abbreviation YY stands for:

  • Yakkity Yak, an Australian animated series
  • The call sign prefix of Venezuelan radio stations
  • As a group of letters for marking of boats ( Boat ) dealers in the Netherlands

YY as distinguishing signs on license plate:

  • Greece: Attica
  • Great Britain: Beverley
  • Norway: Svolvær in the province of Nordland
  • Slovakia: Trailer (second group of letters )
  • Disambiguation
  • Abbreviation