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1.
(interj.) said when expressing happiness!
i got a 100 on my test. YAYNESS!
by jonny December 03, 2002
 
8.
Perpetual serendipity. Happens repetitively by habitual coincidence.
Enjoy the yayness of every day life!
by Ravenlee May 30, 2008
 
9.
Used in the same way as yay but it is better
yayness i'm so cool
by Chariblo December 10, 2003
 
10.
A word that my best friend Katie says. :) Yayness for katie!
Adapted from a conversation with the ever pretty Katie ;)
IfTimeStodStil: yayness!
by Ben January 04, 2005