50-50 (plural 50-50s)

  1. Alternative form of fifty-fifty
    • 2011 October 23, Jefferson Lake, “Arsenal 3 - 1 Stoke”, in BBC Sport[1]:
      Arsenal players protested about the free-kick awarded against Laurent Koscielny for a foul on Crouch but they failed to defend it properly, losing three 50-50s in their own box as the visitors restored parity.