A term for bitter-sweet news, or a good-news-bad-news sandwich. The good news is a 'Yay', the bad news is a 'Boo'.
I won $100 dollars on the lottery yesterday, but then my car broke down and cost me $150 dollars to fix. What a Yayboo.
by Priscilla2011 May 04, 2011

a term for someone who has a sick body, and a sickening face. much like a butterface. yay for the bod. boo for the face.
by anahsohs April 14, 2008
