basementbate 

Basementbate - the act when a teenager stays by himself in the basement and masterbates furiously

The act of basementbate:
I was cooped at my parents basement, basementbating and jizzing all day long to dirty porn.

basementbate by D. Bud November 2, 2020

Basementation 

Camping and/or cramming numerous bodies (people and pets alike) in a homeslice's basement for a particularly awesome weekend.

"I would much rather go on an extra basementation than go to another townie wedding."

Basementation by basement squatter September 28, 2012