can·non·ball also cannon ball 
(kănən-bôl′)
(kănən-bôl′)n.
1. A round projectile fired from a cannon.
2. A jump into water made with the arms grasping the upraised knees, usually intended to make a big splash.
3. Something, such as a fast train, that moves with great speed.
4. Sports A fast low serve in tennis.
intr.v. can·non·balled, can·non·ball·ing, can·non·balls
1. To travel with great speed.
2. To jump into water while grasping one's upraised knees with one's arms.
- offshoot
- offshore
- offside
- offsides
- offsite
- off (someone's) back
- off someone's back
- off (someone's) case
- off someone's case
- off-speed
- offspring
- offstage
- off-the-books
- off the cuff
- off-the-cuff
- off the grid
- off-the-grid
- off the ground
- off the hook
- off-the-rack
- off the rack
- off-the-record
- off the record
- off-the-shelf
- off the shelf