one in the dark
The pin in the back of 1-5, 2-8, or 3-9 split.
A frame without a strike or a spare.
out and in
A hook that is rolled wide from the center of the lane towards the gutter and then hooks back to the pocket.
Bowling in lanes near the edge.
In pro bowling, a score of 200 average is considered to be par. So the number of pins above 200 average are pins over.
When a bowling ball has too much spin and not enough lift.