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A small penis truck,is usually but not limited to having a huge lift kit, bright or exotic colors, chrome rims, and is always clean. Not to be mistaken with a off roading jeep or the like. It is always driven by a man who has to compensate for his dick size, by driving a truck that is bigger than what most men have.
Kid: Why does Bob our next door neighbor have a pick up truck that has a 5 foot lift kit, a bright yellow paint job, and chromed rims?
Kid's mom: Becuase his dick is the size of a shrimp and he has to compensate by driving a SPT or small penis truck.
Kid: How do you know he has a small dick?
Mom: ....
by baratikash August 16, 2011
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A souped-up truck, generally with huge tires and a body that is raised. Small Penis Trucks tend to be candy apple red, but can vary in color as well. You can also tell a Small Penis Truck from a normal truck by the fact that the paint is shiny, waxed and has no scratches, this truck is obviously not being utilized any type of truck uses. If the truck looks as bright and shiny as fingernail polish, this is a dead giveaway.

The Small Penis Truck gets its name from the owners of said vehicles. This type of truck is almost always owned by men who are compensating for the small size of their own genitalia. These men have a complex often referred to as Penis Envy. Because there is nothing they can do in order to increase the size of their own genitals, they attempt to show their manhood in other ways. Owning a giant, jacked up truck somehow, in their own minds, makes up for their like of penis size.

These owners of Small Penis Trucks are often dangerous as many of them feel that that they must constantly defend their manhood in violent ways. They are looking for ways to be manly. This can result in road rage, insulting others, starting fights and claiming that women that ignore them "must be lesbians".

This condition can only be cured if these men are mocked mercilessly. To help them, you should point and laugh at their trucks. Hopefully this will get through to them that the truck doesn't make up for their penis inferiority complex.
"Check out that guy. He must feel inferior about his manliness because he's driving a Small Penis Truck.
by Mako34 August 16, 2011
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I can assure you not all trucks that are jacked up on big tires are because the owner has penis envy. A lot of us prefer to drive them because it's a LOT easier to replace a trailer hitch than the whole rear end of your vehicle. I've got a sedan and a BIG Ford truck and it's night and day the way people drive around you in either. I literally get people a foot off my bumper in the sedan or when you signal to change lanes they speed up to keep you from doing so. Drive a big truck and you reduce those behaviors by 90% at least. Sure they'll honk and flip you the bird but they will let ya over.
I'd rather drive the small penis truck because it keeps people off my tailgate.
by BigTrucksEndViolence September 30, 2013
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