Origin of lubric
1480–90; < Latin lūbricus slippery, smooth, Medieval Latin: lewd
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
"smooth, slippery," late 15c., also "lascivious, wanton," from Middle French lubrique (15c.) or directly from Latin lubricus "slippery" (see lubricant (adj.)). Related: Lubrical.
Online Etymology Dictionary, © 2010 Douglas Harper