Cup-Shake is a 9 letter English word. It's valid Scrabble word worth 7 points. It's valid Words with friends word worth 10 points.
You can make 292 anagrams from letters in cup-shake (-acehkpsu).
First recorded in 1785-95; so called because wood so damaged separates into concentric, cuplike pieces
cup shake is often associated with other forms of shake, and not infrequently shows traces of decay.
A local defect somewhat similar in effect to cup shake is known as rind gall.