Some occasional strong suggestive references.

Stephen bangs his head with a shoe numerous times in a fit of rage.

In one episode, Stephen appears to threaten Jack with a chainsaw.

Many of the episodes contain none, but some have uses of g*d-d*mmit, "god", "Je*us Chr*st", "hell", "Ass", or "sh*t". One early episode contains a use of "f*cking" (which could easily be missed) and some of the most recent episodes use this word also.

Stephen doesn't curse that much, he uses minor words like (what the heck, hell, damn, crap, pissed, screw you, freaking, douchebag, retarted etc.) however he called his dad a dick in one episode. He gives people the middle finger whenever he's mad also.

In one of the livestreams, Stephen gets very drunk. Otherwise, very little.

Practically none.