Yayness

Origin

yay + -ness

Full definition of yayness

Interjection

(slang, childish) yay; hooray

2000, "Miss Sparkle", Much yayness of the yay variety! (on Internet newsgroup alt.uk.penpals)Wooo, yayness for you also! :)
2001, "Belegdel", ten for ten poll (on Internet newsgroup aus.culture.gothic)I finally have Aliens Special Edition! Yayness!