n.- Low growly noises made to express utter disdain with another person's very existence (Source - Count Longardeaux's Strong Badian Jerktionary Fo' My Own Words!)
If Hey Steve shows up I don't want to be held accountable for whatever gutterance I will undoubtedly make.
1) a "utterance", from the gut statement, usually blurted out without thinking.
2) a word that needs bleeping i.e.: "gutter words"
3) involuntary groaning of the guts
Quote from formerly employed person caused his dismissal. (something about shoving it.) This "gutterance" cost him his job!