Rut: a fixed or established mode of procedure or course of life, usually dull or unpromising.
Doesn’t sound like much fun, does it?
It would be a different story if that “fixed or established mode” was whiling away at a luxury beach-front house on a South Seas island, while nubile young things pandered to your every whim and a Michelin-starred chef fed you truffles by hand.
But it’s not that. At all.