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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
von me 14. Dezember 2002
 
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!"
von Vicious Bitch 29. Juni 2006
 
3.
erect penis
making out with his girlfriend gave him a boner
von Anonymous 16. Juni 2002
 
4.
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.
von areon5674 14. Februar 2006
 
5.
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.
von Shoot Me Down 19. September 2005
 
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.
von Grand Lizard Theodore 25. September 2006
 
7.
an erectile penis, often a sign of arousal
i sat on his lap and holy crap, he had a boner!
von packing 27. Dezember 2005