in-off

From a reconstitution of (go) in + off (preposition), as used in phrases such as, "The white has gone in off the black."

in-off (not comparable)

1. (snooker, pool) Of the cue ball: (going) into a pocket, after cannoning another ball.
   • 2008 May 2, John Dee, The Telegraph:

     Hendry replied with 34, but went in-off attempting a double and next season's world No.1 returned to the table to put the frame beyond doubt and level at 4-4.

in-off (plural in-offs)

1. (snooker, pool) The situation where the cue ball goes into a pocket after striking the object ball.

   He looked set to win the frame, until the in-off from the yellow.

• (in English billiards): losing hazard