It's obviously about Morris dancing and excuses for drinking. Jinky Wells was the fiddler for Bampton Morris from about 1900 to 1950, and William Kimber (Jr) played concertina for Headington Quarry MM from about 1900 and died about 1961. He was one of Cecil Sharp's main informants.

I believe Morris men have occasionally been known to indulge in the odd libation.