Wallbanger – slang for a squash or racquetball player

Wallpaper shot – a “Hard-Line” shot that rebounds straight along a side wall, very difficult to return

"Z" ball – a shot rebounding off the front wall, then hitting both side walls in a sort of “Z” shaped pattern

"Z" serve – a serve that rebounds off the front wall, then hits the side wall, followed by the floor, and then the other side wall near the back wall