Wikipedia
Three-cushion billiards (sometimes called three-cushion carom, three-cushion, three-cushions, three-rail, rails and the angle game, and often spelled with "3" instead of "three") is a popular form of carom billiards.
The object of the game is to the off both and contact the at least three times before the last object ball. A point is scored for each successful carom. In most shots the cue ball hits the object balls one time each, although hitting them any number of times is allowed as long as both are hit. The contacts between the cue ball and the cushions may happen before and/or after hitting the first object ball. The cue ball does not have to contact three different cushions as long as they have been in contact at least three times in total.
Usage examples of "three-cushion billiards".
So I lay back on the bed, twitching a little now and then to feel how the bed would twitch back, and how it would twitch Essie, cuddled close into my side, and she would twitch a little-it was a little like playing three-cushion billiards, but with more interesting pieces-and thought, calmly and sweetly, about Klara.