Definitions by Boinkin Her

O.S. The Best 

A common name used to describe someone that is very sensitive. "O" stands for "Over" and "S" stands for "Sensitive"

Guy 1: Did you see that guy cry in the movies?

Guy 2: Yea he is O.S. The Best

Guy 1: Exactly

O.S. The Best by Boinkin Her February 13, 2010