The gurgling, pig squealing type noises that bands such as Cannibal Corpse, WhiteChapel, Suicide Silence and many other Deathcore or Death Metal bands use
"Dude! I saw WhiteChapel in concert last night, the gutterals were insane!"
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.