Out of Sorts

 I'm out of sorts today.

Out of sorts means feeling irritable, upset or unwell.  Most commonly, the origin of the term out of sorts is attributed to typesetting.  As this theory goes, the phrase refers to the individual metal type called sorts that printers used. These sorts would be stored in their individual compartments.  If the sorts were in short supply or stored in the wrong compartments, then the printer was out of sorts.  However, the term out of sorts was recorded long before the printing press and today all type setting is done digitally, eliminating the need for physical type.

Ah, I got nothing.