Someone who states something that is extremely obvious to the rest of us.
A person who is a little slower than the rest of us only to bring something to our attention way after it already happens.
C.O.- Hey ya'll the sky is blue!
U.S.- Thanks for the update Captian Obvious!
C.O.- That whore gave me the clap.
U.S.- No shit Captian Obvious that why she didn't charge you!