from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unexpected event.
- n. A pitch thrown with the arm motion of a fastball, but which travels at a much slower velocity because it is released without the fingers adding power to the delivery.
from the GNU version of the Collaborative International Dictionary of English
- n. same as change-of-pace.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a baseball thrown with little velocity when the batter is expecting a fastball
Probably alteration of change-of-pace (Wiktionary)