What does 'Shooting fish in a barrel' mean?

If something is like shooting fish in a barrel, it is so easy that success is almost guaranteed.

Example: "For my first exam I was really nervous and worried that it would be too difficult for me, but it was actually as easy as shooting fish in a barrel!"

Idioms similar to 'Shooting fish in a barrel'

All idioms have been editorially reviewed, and submitted idioms may have been edited for correctness and completeness.

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