1736, “a long, rambling discourse,” from an altered, Kentish colloquial survival of ragman roll “long list or catalogue” (1523), in M.E. a long roll of verses descriptive of personal characters, used in a medieval game of chance called Rageman, perhaps from Anglo-Fr. Ragemon le bon “Ragemon the good,” which was the heading on one set of the verses, referring to a character by that name. Sense transferred to “foolish activity or commotion” c.1955, but known orally from 1930s.

rig·ma·role (plural rig·ma·roles) or rig·a·ma·role (plural rig·a·ma·roles)

noun

Definition:

1. ridiculously complicated process: an irritating, tedious, or confusing sequence of tasks, especially tasks that seem unnecessary or absurd

2. overelaborate account of something: a tediously long, complicated, or unhelpful explanation

[Mid-18th century. Probably alteration of ragman roll, parchment scroll used in the gambling game of ragman]

Word History

A ragman roll was a parchment scroll used in a medieval gambling game. The roll had things such as names written on it, with pieces of string attached to them, and participants had to select a string at random. The word ragman may have been a contraction of ragged man, perhaps in allusion to the appearance of the scroll, with all its bits of string hanging from it. Ragman roll eventually came to be used for any list or catalog, and ragman itself denoted a “long rambling discourse” in 16th-century Scottish English – a meaning that seems to have transferred itself eventually to rigmarole.

RE:
What is the definition and origin of the word "rigmorale"?
I cant find it anywhere.

1 : confused or meaningless talk

2 : a complex and sometimes ritualistic procedure