Shitnuts is the act of a man inserting his testicles into his partner's anus, specifically a dirty one. When the scrotum comes out, it should be covered in shit.
Greg: Man, I heard you tried shitnuts with Bianca last night
Tom: Yeah, so what? I like the creamy feeling.
Greg: Tom, that's absolutely foul.
Utility beer is the beer you keep around for the day-to-day moments when beer is a necessity to assist in pedestrian activities (golf, plumbing, yardwork, babysitting, staff meetings, Zoom calls). For the beer snob it is the beer you save for neighbors when they drop in at 3 p.m. on a Tuesday. It is differentiated from the actual high-end beer you save for special events, holidays, and special tastings.
Person 1: Dave, did you bring along those hazy craft IPA's so we could drink while cleaning Lyle's pool?
Person 2: Nope. I just have a bunch of utility beer that Steve dumped on me. Good enough for this. It is only 10:30 a.m.