Wobble-Banisher-Implement

Also known as shims or a wobble-wedge a piece of wood or rubber used to stabilize a table or furniture. The term Wobble-banisher-implement was first used by a redditor on r/EnglishLearning and many people have liked it.

I will get a wobble-banisher, my desk is wobbly
A: "What do you call this wobble-banisher-implement you insert under uneven legs of a table?"
B: "A shim or a wedge"