What is an idiom for the word beach?

There isn't one single perfect idiom for "beach" that captures its entire essence. However, depending on the specific context, you could use:

For a relaxing, carefree feeling:

* "Take it easy" (meaning relax and enjoy)

* "Kick back and relax" (meaning to unwind)

* "Hang ten" (meaning to surf)

For the vastness of the ocean:

* "The big blue" (meaning the ocean)

* "The open water" (meaning the vast sea)

For the beauty of the shoreline:

* "A slice of paradise" (meaning a beautiful and idyllic place)

* "A hidden gem" (meaning a beautiful and unknown place)

You could also use more figurative language to describe the beach, such as:

* "A sandy haven"

* "The seashore's embrace"

* "A symphony of waves"

Ultimately, the best idiom or phrase will depend on the specific meaning you want to convey.