be a piece of cake

be a piece of cake

To be a very easy task or accomplishment. I thought I was going to fail the test, but it turned out to be a piece of cake!
See also: cake, of, piece

be a piece of cake

  (British, American & Australian) also be a piece of piss (British very informal)
to be very easy 'How was the test?' 'A piece of cake!' The interview was a piece of piss.
See also: cake, of, piece
References in periodicals archive ?
He's fooling himself if he thinks the military thing would be a piece of cake.