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(n) refers to the enlarged or fully engorged male reproductive organ that is designed mostly for placing in between the crack o' ya ass.
Usage:

"I got something for the crack o' ya ass. It's ERECTOSAURUS!!!"
by johnahn January 31, 2007
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2
A dinosaur from the Jurassic period which maintains a erection for the duration of its adult life.
We were digging in the back yard and found a erectosaurus fossil.

I'm about to go erectosaurus on this bitch!

That mandingo aint got nothing on my erectosaurus
by Migbla August 07, 2017
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