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1.
1. Warranting the expression "yay"; possessing the quality of yayness.
2. Extremely happy; joyful.
3. Unbelievably, soul-shatteringly cute.
1. "I just won a million dollars! How yayful is that??"
2. "Video games make me yayful inside."
3. "Awwww, look at the little kitten! So yayful!"
by Kiri Amaya February 06, 2007
5 1
 
2.
full of yay. awesome. replacement for any postitive word. used describe people named carolyn
Man look out those waves, so yayful.

Bro, i found 60 cents on the street, HOW YAYFUL IS THAT.
by Nikhil Mathew February 13, 2007
2 1