ETYMOLOGY
of uncertain origin
n. 1. possibly from rig (a wanton girl or woman)
EXAMPLE (for adj. 1.)
“… As it is to be seene, namely at Rome, what reuenues and rents, that great and soueraign ruffian getteth by his whoores. And afterward of the drouning and killing of children, and secretly murthering, and casting in corners and ditches, as is vsually practised amongst these riggish and lecherous prelates. …”
From: Jan van der Noot’s Theatre, wherein be represented the miseries that follow the Voluptuous Worldings
By Jan van der Noot
Translated by Theodore Roest, 1569
Lexicophilia 