mullygrub verb to sulk US A venerable noun (meaning “depressed spirits”), now surviving in verb form.
So your sister Darlene runned off with a albino motorcyle gang president. Mullygrubbin’ around the house ain’t gonna help. Don’t you worry, Tyshonda, we’ll find you somebody just as good. — Ken Weaver, TexasCrude, p. 118, 1984