grotgrot

(or grot-grot). Something very uncomfortable or highly unpleasant that you nevertheless voluntarily or via mild friendly coercion are going to do, or think about doing. On the odd occasion you might get into grotgrot situations for your paid work, which might count as mildly involuntary (are you financially free enough to quit?).

Brother: "So are you going to test the Wim Hof cold exposure method for me bro?"

You: "Yes, but it will be extreme grotgrot. Are you going to sponsor for the ice?"