piece of cake, a

Explanation: What is an idiom?

something easy to do.

      1. No problem. When you know what you're doing, it's a piece of cake!
      2. Glad to help. It was a piece of cake.
      3. Rescuing frightened cats is my specialty. Piece of cake!


This expression originated in the Royal Air Force in the late 1930s for an easy mission, and the precise reference is as mysteriousas that of the simile easy as pie. Possibly it evokes the easy accomplishment of swallowing a slice of sweetdessert.

Category: p,food

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