What the hell does "Jam Up and Jelly Tight" mean?

Tommy Roe had a hit in early 1970 called "Jam Up and Jelly
Tight."  It was an infectious little song that we all sang
along to.  But just what were we singing, anyway?! 
Tommy explains in this exclusive interview with Dan Markus. 
And for more interviews, visit https://danmarkuswaxmuseum.com.