from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. Nervousness or tension that causes an athlete to fail to perform effectively, especially in missing short putts in golf.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A nervous condition which prevents a sportsman from playing properly; especially a condition which causes a golfer to miss an easy putt, or a tennis player to serve a double fault.
- n. Plural form of yip.
- v. Third-person singular simple present indicative form of yip.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. nervous tension that causes an athlete to fail (especially causes golfers to miss short putts)
Probably imitative of jerky motions caused by tension.(American Heritage® Dictionary of the English Language, Fourth Edition)