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1.
A severe disease that plagues many a person, causing them to stick their butts into situations in which they are not welcome. It has several side effects including but not limited to: big cheese behavior, denial, nubbiness, aggravation, bloatedness, and occasionally causes dislocation of head, when on an all calculator or stinky cheese diet.
1. Platey had buttiness but refused to believe in the disease's existence.
2. Raytea decided to use "slang" words since he thought he was a big enchilada.
by saberscars April 29, 2011
 
2.
Adjective used to describe how a person or object is like a butt.
I can't stand that telephone operator's buttiness.
by Helga Kay June 05, 2007