fence posts
7-10 split. Interchangeable with goalposts and bedposts.

field goal
Bowling the ball between two standing pins. This is common for wide splits.

fill
The pins knocked down after a spare.

fit split
The type of split where the pins are close enough together for the ball to pass between the pins and still hit both of them.

flat ball
Bowling the ball in such a way that there are few revolutions and little action on the ball.

foul
A foul is marked when the foot goes beyond the foul line.

foul line
The line that seperate the lane from the approach.

foundation
Bowling a strike in the ninth frame.

foundation, early
Bowling a strike in the eighth frame.

frame
In the game of bowling, this is one unit of a total of ten that makes up one game.

frozen rope
A bowling ball rolled straight into the pocket with excessive speed.

full hit
The bowling ball hits the pin head on.

full roller
A ball rolled so that it rolls over its full circumfrerence.