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1.
an erect blood filled penis. brought on my sexual arousion. the average male gets 3 a night while your sleeping. also known as erection, stiffy, chubby, hard on
that guy would stick his boner in anything with a hole
by me December 14, 2002
10959 3769
 
2.
1. Something that occurs when the blood leaves a man's brain and goes to his cock.

2. Something that you hide from your parents when there's a female in the room.
"Dude, have Jessica sit on your lap so your mom doesn't see your boner!"
by Vicious Bitch June 29, 2006
7407 3823
 
3.
erect penis
making out with his girlfriend gave him a boner
by anonymous June 16, 2002
5720 3378
 
4.
A slang term for an erect penis due to sexual stimulation. It is called so because the penis resembles a bone.
The man got a boner because he was looking at Playboy.
by Shoot Me Down September 19, 2005
4145 2802
 
5.
1)an erect penis
2)what your boyfriend has when you are making out with him or just holding his hand
3)how big you wish your penis was all the time
1)"my penis was so fucking hard last night I had a major boner"
2)sally was making out with johnny and felt his boner poking her.
3)"Man I had a huge boner last night I wish my penis was that big all the time without all the blood in it," Johnny thought to himself.
by areon5674 February 14, 2006
4257 2944
 
6.
The bane of an adolescent young man's existence. Usually happens during class, normally after eyeing an attractive girl. Extremely embarassing, and when you get one, you'll stick your hand in your pocket to tuck it into your boxers in a futile attempt to avoid discomfort/embarassment. In the worst cases, you'll end up coming in your pants.
Rob: Shit, man I was looking at Samantha in English class, and I got a damn boner, man!

Joe: Did it show?

Rob: It looked like I was hiding a fuckin' fire hydrant in my jeans!

Joey: Shit, dude.
by Grand Lizard Theodore September 25, 2006
2647 1420
 
7.
an erectile penis, often a sign of arousal
i sat on his lap and holy crap, he had a boner!
by packing December 27, 2005
2679 1705