used to define huge sarcastic assholes, that end up becoming amazingly sweet. Seans know exactly how to piss you off and then five seconds later have you cracking up. Huge jerks, but gotta love 'em.
A Teenage white kid that has an abnormally large penis usually ranging to 7.5 inches to

An all around amazing person, everyone knows there "Sean-Thomas's"
Also known as a master in bed

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

Someone who acts like a complete jerk and cries like a man-baby when he doesn't get his way.