I read this phrase in a Spiderman comic, probably 1990 +/- 5 years. If memory serves Harry Osborne said it to Peter Parker, something regarding Norman Osborne's activity as the Green Goblin. Anyway, it's one of those phases that immediately etched itself into my brain and replays itself whenever the situation seems appropriate. I've always wondered if the quote had a more respectable original source, but haven't been able to find one.
Swearing is a good heuristic still I think. The American corporate world remains rather prissy about swearing, so if the post sounds like a hairy docker after 12 pints then it's probably not an LLM.
That should be 'reining in'. "Reign" is -- ironically - - what monarchs do.