A dance move where one flicks their ankle in a left to right motion while bending forward towards said ankle, shimmying your shoulders and moving your hands as if you were shining your shoe
Have you seen the wayRach does the "shine the shoe"? She's such a good dancer.
Meaning: Occurring with a very low frequency, suggesting that something is likely to happen only on exceptional occasions or not at all. It is used to describe an event or action that is close to not happening but is not entirely absent.
Example: "My application will be approved when the sunshines on Rjukan!"