Sounds like his "time of the month". Think I'm kidding?? I'm not. I'm serious. Make note of the dates and see if in about 28 days or so he's grumpy again.

Typical MLC cycling. FW still does it to a much lesser extent and can now recognize what it is and not take it out on everyone around him, but it's still very real and very cyclical.

Just give him a wide berth for a few days. Don't engage his spewing and he'll be better soon.

BFM

There is only one person who could ever make you happy, and that person is you.
David Burns, Intimate Connections