Top Definition
A half chubbed erection, stimulated by the ever tightening jambayala that sometimes occurs while sitting down. Generally happens in a sitting situation with some subtle vibration (driving on a bumpy road) when your pants jumble up and your Weiner comes restricted and thus forms a chubby pushing against your pants.

Also known as a ponybone or a poonboon
Frig duuude you gotta stop driving so I can deal with this pony boner. Me n the Bros went offroading and I got the biiiiggest pony bone.
by masta & commanda April 29, 2015

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A boner that you get when you see two ponies having sex. A boner that is slitely on the down side/that boner aftershock.
A few minutes after watching porn I had a pony boner. My two ponies stared having sex right I front of me and I got a pony boner so I had to get some tighter pants on. I got a pony boner when I sew the pony with his dick and balls hanging down.
by P sissy January 29, 2010

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An incidental erection. Usually common in the mornings, or with certain legwear.
My little brother was hanging around in his sweats yesterday and he had a fucking PONY BONER all goddamn day!
by Cesar X. Figueroa September 12, 2005

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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