Origin of mundungus
1630–40; Latinized variant of Spanish mondongo tripe
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
"tobacco with an offensive odor," 1640s, from Spanish mondongo "paunch, tripe, intestines," related to modejo "paunch, belly (of a pig)."
Online Etymology Dictionary, © 2010 Douglas Harper