noun plural
or mul·ly·grubs ˈməlēˌgrəbz ; also mol·ly·grubs ˈmäl-
Etymology: alteration (probably influenced by grub ) of earlier mulliegrums, perhaps alteration (perhaps influenced by obsolete English mully dusty, moldy, from English mull (I) + -y ) of megrims, plural of megrim (I)
1. : a despondent, sullen, or ill-tempered mood : sulks, blues
2. : a griping of the intestines : colic