the annoying bump in the crotch area of jeans that resembles an erection.
Question: Holy crap Dick Cheney, are you hard?

Response: No, I just have a jean boner.
by retro geek February 28, 2009
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the phenomen occuring when your jeans create a large protrusion in the genital area, commonly caused by a mis-aligned belt buckle of some sort. can be extended to the point where one can say things such as, "khaki boner" and "trollie boner". originated in Ontario by a one "yomar" when such classification was un-heard of. remedies: put the belt buckle at the rear and or sides of the trousers.... may look "odd", but somewhat effective. main problem, the button creates a pivot point for such "boner action". Can sometimes be your friend, yet usually your worst enemy!
"holy shit, it looks like i'm popping wood"

"damn , people are gonna think i have a stiffy"

"pajoneowned, the girls think i have a 2 inch boner"
by Chris G. January 23, 2004
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the bumps you get on your zipper area, that look like a boner, whenever you sit down while wearing any type of pants with zippers. mostly if you wear jeans.
girl: omfg! I hate this!
boy: what?
girl: I keep getting a jean boner whenever I sit down.
boy: hahah. you have a dick!
girl: dilligaf.
by woaaah May 28, 2008
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that little bump you get when your pants are slightly too baggy in the crotch area. can cause laughter at times of awkwardness and may be mistaken for an actual erection. if you have one of these, put on a belt and pull your pants up past your belly button, quick! :D
did you see jane's pants? they are way to saggy.

yeah man, they give her a total jean boner. i'll give her my belt!
by themirrorbroke March 18, 2011
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When your jeans wrinkle up to make it look like you have a hard-on. Normally when sitting.
"Hay guys, Steve has a boner!"
"Very funny guys, its just a jeans boner"
by TheHastieLanyon June 4, 2014
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You know that thing when you're sitting in down and your jeans ripple up in the crotch give the illusion of one having a small erection. Thats what a Jean Boner is.
"Dude look at Susy's crotch"

"Oh shit, she has a total Jean Boner!!!"
by In.The.AM October 17, 2012
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When your jeans are loose and it folds upwards around the crotch area to make it look like you've got a gigantic boner (depending on how loose they are).
Today I wore these new ripped jeans , but they were loose so I walked around with a jean boner all day.
by Candygem729 November 15, 2016
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