mulligrubs (MUL-i-grubz) noun

   1. Grumpiness; colic; low spirits.

   2. An ill-tempered person.

[From mulliegrums, apparently from megrims (low spirits).]

“I got the dismals. Not exactly the dumps or mulligrubs, more like moody and uncertain, as when you don’t know what’s going to happen next.”
Fred Schmidt; Middle East Thing Puts Chill on Festivities; San Antonio Express-News (Texas); Dec 30, 1990