Lucky Lupin
a crescent moon. reference to Lupin in the Harry Potter series who turns into a werewolf at the full moon, thus when the moon is not full, he is lucky.
tom looked up and saw the moon was a lucky lupin tonight
Lucky Lupin Moon
a moon that is not full. references the harry potter character werewolf remus lupin, who can be considered lucky when it is not a full moon and he does not become a werewolf.
Good thing it's a Lucky Lupin Moon, I don't think I can handle any werewolf drama from you tonight.