bis·cuit
 /ˈbıskət/  noun  ,  pl   -cuits [  count  ]
  1 US : a small, light roll that is eaten as part of a meal
  2 Brit : cookie
  take the biscuit
    Brit    informal   : to win the prize
    — used to describe something that is extremely surprising, annoying, etc.
    I've heard some silly excuses in my time, but this one really takes the biscuit! [=(US) takes the cake]