"The Recent Unpleasantness" ? I've never heard it referred to as such. Sounds much more like a Britishism to me.

From the Digitrad:

"note: as sung by The Highgraders, San Francisco, early 60s -
the traditional chorus, which makes no sense, is "Jimmie Crack
Corn"; I prefer "Gimmie crack'd corn" - whiskey] ES
Could be. Also might not be. Logic often leads to fakelore. RG
DT #669"