Meanings
From the red shoes, worn by Dorothy in "The Wizard of Oz", that had magic properties unknown until the end of the story.
How to pronounce "ruby slippers":
AU
A valuable feature (of software etc) overlooked by the user.
Example Sentences
1
She clicked her ruby slippers three times and whispered "there's no place like home."
2
The ruby slippers sparkled as she danced across the yellow brick road.
3
Dorothy's ruby slippers were a key symbol in "The Wizard of Oz".
4
The witch desperately wanted the ruby slippers and would stop at nothing to get them.
5
She felt powerful and confident whenever she wore her ruby slippers.