A person that sneaks around and ambushes people to steal their semen. They are rarely seen during the day and if you do see one, be prepared to protect your nut.
Hey man I heard the cops came to your house last night, everything alright?
Yea man apparently a break in, but they didn’t take anything from my house so I’m alright. However, I noticed my balls were the size of a blueberry, thus I knew it had been a nut goblin that had burglarized my home.