Muling

The complaining noise a mule makes during stressful work.
A cross between a whinny and a bray.

(Old-English style threat from a recent popular film)
“I wont touch Barton. Not until I make him kill you. Slowly, intimately in every way he knows you fear. And then he’ll wake just long enough to see his good work. And when he screams I’ll split his skull. This is my bargian you muling quim. ”