What does the term RIGOR MORAL mean?

I believe you're actually referring to the Word "rigmarole" (this is a perfectly understandable mistake, I made it myself when I first heard the Word - the pronunciation does sound like "rigor moral" or "rigoramoral"). A rigmarole can be either a long/complicated procedure (or statement), or a long, rambling story.

In case it helps to better understand it, the Word is derived from an alteration of "ragman roll," which was a legal document that denoted a list of offenses - thinking of it like that can make the concept clearer; imagine a long, boring and somewhat redundant legal document or list of charges. (Of course, the Word has evolved and become more than just that, as the definition implies, but the origination can help understand the concept from its original foundation.)