This
database is a comprehensive collection of all the American idioms and slang available.
American Idioms are many and varied. We hope you enjoy our collection. We are adding more all the time.
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If something's a moot point, there's some disagreement about it: a debatable point.
In the U.S., this expression usually means that there is no point in debating something, because it just doesn't matter.
An example: If you are arguing over whether to go the beach or to the park, but you find out the car won't start and you can't go anywhere, then the destination is said to be a moot point.