An erection that occurs when standing on your own. These are entirely random.

Someone that usually is in small friend groups, or gets new friends almost every year, or has nun at all. Many people know them but don't really know them.

a person who likes to be alone. they have friends and people who want to be around them but instead they prefer to be by themselves.

Happy being alone

Someone who either doesn't have many contacts on MSN or simply cant be bothered to start a conversation with anyone despite there being many people online but no one is speaking to them.
To attract attention they will sign out for a couple of seconds then sign back in again, trying to draw attention to themselves so that people will talk to them.

anyone who gets a boner when alone or in a group of guys.

An event occurring on Sunday evenings when the alpha-male suddenly realizes that his nightly escapades suddenly seem for nothing as he is completely alone, finding himself laughed in the face by his suddenly erect boner and no one there to disarm it. Hence loner with a boner.

a crappy school computer