(adj.) A word used to describe a guy that is cool, attractive and doesn't speak in long sentences and only reply in words like "Yes" "No" "Maybe" or just shrug their shoulders, nod heads or shake them "No". They usually have an evil smile in their face that makes people wonder what they're thinking about and makes girls fall in love because its so cool. They are always silent and only speak when something is important. Most of the time mistaken as emo or scheziophrenics.
Rick is so mysterious (adjective), he's cool.
She finds mysterious (adjective) boys attractive.