Contraction of "ain't" and "ya"; means "aren't you."

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

Well if it aintcha balls and it aintcha asshole, it's ya aintcha. It's the area between the two. (also can be known as your gooch or taint.)

aintcha is high quality girl. Derived from the phrase 'Aren't you just a fine looking girl'