howl at the moon

ask for the moon

To claim or desire something that one cannot have.

blue moon

A long time.

hang the moon

To place the moon in the sky: used as an example of a superlative act attributed to someone viewed with uncritical or excessive awe, reverence, or infatuation.

once in a blue moon

Very rarely; very infrequently.

once in a purple moon

Extremely rarely; almost never.

see the dark side of the moon

To do or experience something exceedingly difficult or rare.

the moon on a stick

All that one could desire, especially as an unreasonable demand; everything.

think one hung the moon

To consider or think of someone to be extraordinary or exceptional.