Dumbfuckery

I just learned a new word today

Used in a sentence:

I'm a raging alcoholic, so I used to take public transit through and to bad neighborhoods to get to cheap bars. This is in Chicago, on the Red Line train which runs 24/7.I've seen people do drugs, pickpocket, robbed others at knifepoint, urinate, fight, and punch the lighting systems... all in the same train car as me. I've never had any problems personally, I just sit there with my headphones and ignore whatever dumbfuckery is going on.