1 definition by lookkittens!
A person that is inexplicable. Guiness is quirky, lively, and unpredictable. You will often find yourself double taking a "Guiness" statement. Through all of this you will recognize an affectionate friend that is always there to talk and add a random narrative to brighten your day. When you first meet a Guiness you will realize instantly that he is your soul mate.
"That is so Guiness."
by lookkittens! September 11, 2010