Mulligrubs (MULL•ee•grubz) Noun: (used with a singular or plural verb.) (or can be used as an Adjective if you like.) -A despondent, sullen, or ill-tempered mood. -Sulky, blue or grumpy. -A griping of the intestines, Colic. Mulligrubs was ALSO an Australian television series aimed at pre-schoolers that aired from 1988 to 1996. From: 1590s fanciful formation of mulliegrums, meaning "fit of the blues" or "colic". Used in a sentence: "My emo friend Josh is always so mulligrubs..."