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yay - 2 dictionary results
yay   (yā)   
interj.  Used as an exclamation of pleasure, approval, elation, or victory.

[Alteration of yea.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Yay
Yet Another Yacc

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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