The phrase "Under the weather" has been variously attributed to the nautical condition of being too ill to serve on deck, and being sent down below the weather deck. There are other proposed etymologies, but we will disdainfully ignore them since this is a nautical blog.
I am, at the moment, under the weather.
I will appreciate those of you dear readers that stand by me as I work thru this. And the rest of you who abandon me in my time of need? Well, you can go hang.