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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.)
when i was having sex with my girlfriend last night, i hurt my penis because i pulled out too far and hit her aintcha on my way back in
by coltan072609 September 12, 2009
Contraction of "ain't" and "ya"; means "aren't you."
Gettin' a big head, aintcha?
Aintcha gonna come inside?
by Anonymous May 03, 2003
aintcha is high quality girl. Derived from the phrase 'Aren't you just a fine looking girl'
Last night I let some aintcha swallow my wood
by old dirty February 16, 2003