The "sanch" is commonly known as the region located between the testicles and rectum. Also known as the taint, or gooch. There have also been many sanch groups discovered. There are sanch ticklers, sanch munchers, sanch punchers, sanch lickers, and of course the sanch slappers.
Hey Joe! You are a real sanch tickler you know that?
Listen, if you back talk me again, I'm going to punch you right in the sanch.
I met this chick at the bar last night, boy was she a sanch licker.