What is Stegosaurus?
1.
A lewd act in which, while a man is having vaginal sex with a woman from behind (doggy-style), he inserts the wrong end of a spiked dildo into her anus, so that it sticks up like the tail of the dinosaur from whom it takes its name.
I hear Sam gave Kate a Stegosaurus.
2.
-MAN ONLY MOVE- A "stegosaurus" is a type of dick move, much like the batwing or the brain. To successfully do the stegosaurus, you must hair gel your pubic hairs into a mohawk. After drying, lie on your back (fully naked), and get a full on erection. In this postiion, with the mohawked pubes and boner in an upside-down postion, your cock+balls will look like a roughly detailed dinosaur
Jimmy wanted to show his friends the stegosaurus, but he didn't have any hair gel.
See
3.
Abbrev.--Stego
Any and all beers
Hey Dan, I'm going to the liqour store want me to pick up some stegos?
Yeah Kev, why don't you get some stegosauruses for tonight.
See
4.
The box that contains traffic lights, because of the resemblance of the shields for each traffic light to the plates on a stegosaurus' spine.
If you're in a hurry, use the highway, 'cos you'll have a stegosaurus at every block if you're using the local streets!