Definitions by Billy Gutenburg

Spidernaut 

A spidernaut is a spider that crawls onto your penis while your jacking off and then gets rocketed off of said penis after you cum, making it a Spidernaut.

Man, I saw a spidernaut last night, that guy flew up so high that he hit the ceiling!

Spidernaut by Billy Gutenburg August 10, 2020