(n.) A combination of the words corn hole and poon tang. Corntang is a word used to describe a girls butthole.
(v.) The act of eating a girls butthole.
Wow that girl is so hott. I would definitely eat her corntang.
You have a beautiful butthole, if only you were down to corntang.
What? You haven't douched today? Its fine, I'll just corntang.