[foul-mouth d, -moutht]
using obscene, profane, or scurrilous language; given to filthy or abusive speech.
Origin of foulmouthed
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for foulmouthed
In St. Vincent, the actor plays a foulmouthed, alcoholic chain smoker with no regard for anyone but himself.Meet Vincent McKenna, Your New Favorite Bill Murray Character|Alex Suskind|September 6, 2014|DAILY BEAST