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10.
A boner that appears without warrant and often by itself with no other boners around. I.E, a boner appearing at a strange time that no other man would find sexy.

A spontaneous boner, if you will.
"I was in math class and got a total loner boner. Had to cover it with my text book."
by Supercalifragilisticexpaladocious January 14, 2008
15 16
 
1.
A boner or erection that occurs in one's home, or in any other place alone. This includes when they are looking at porn or reading/thinking about something erotic. A Loner Boner can also occur when somebody unattractive is around, such as a parent. However, if you are with a girl (or boy, depending on your gender preference) and you get a boner, this is not considered a Loner Boner.
Jeff: Dude, I just got a total Loner Boner last night.
Mike: What did you do?
Jeff: What every civilized man would do! Took advantage of it!
by Draginack August 04, 2008
53 10
 
2.
When a person who has few or no friends and keeps to themselves masturbates.
It seems like all Jeff does anymore is hole up in his room and work out his loner boner.
by Verbal Platinum Princess April 25, 2009
50 26
 
3.
When she's "not in the mood".
Man, we were fuckin' all alone at my house.. Lights out.. Under a blanket.. And then I find out I've got a loner boner.
by AviatorsMan August 13, 2008
43 24
 
4.
anyone who gets a boner when alone or in a group of guys.
Ryan Nagel is a total loner boner
by michael and andrew November 05, 2010
20 9
 
5.
An erection that occurs when standing on your own. These are entirely random.
The horse standing alone in the middle of the field had a giant loner-boner.
by i get bored sometimes. October 02, 2009
9 2
 
6.
When you think something or someone is hot so you get a boner, but nobody else has a boner or thinks it is hot.
Bill: ah, that's hot, you got a boner too?
Bob: hell no that's gross!
Everybody: (simultaneously) Loner Boner!
by Poonsquasher2.0 December 28, 2011
7 4
 
7.
When you miss your pork pal so much just thinking about her/him gives you an erection.
"WTF man? Why are you pitching a tent around me?"

"I was looking at one of Crystal's pics. She's in Chicago and now I've got a loner boner!"
by ThePariahDog April 14, 2012
7 7