I’m just sitting there twiddling my thumbs up my ass

A friend of the contributor had been out of work for over six months, and mentioned that when he’s at home and done with job applications for the day and has nothing left to do, “I’m just sitting there twiddling my thumbs up my ass.” This is a congruent conflation of “twiddling (one’s) thumbs”, “standing around with (one’s) thumb up (one’s) ass”, and “sitting on (one’s) ass”, all meaning to be idle and wasting time. A big thanks to Daniel Thomas for hearing this one and sending it in!