Green’s Dictionary of Slang

peter grievous n.

also peter grievance
[Fr. petit-grief, imported by refugee Huguenots to Sussex dial]

a whiner, a complainer; a whinging child; thus Peter Grievous touch, a state of possessing such qualities.

[UK]Westmorland Gaz. 1 Dec. 4/3: The Peter Grevous touch is in opposition to the cordial grapple.
[UK]Sl. Dict. 251: Peter Grievous, a miserable, melancholy fellow; a croaker.
[Aus]Sydney Sl. Dict. (2 edn) 7: Peter Grievous - A miserable, melancholy fellow.
[UK]Farmer & Henley Sl. and Its Analogues V 178/1: Peter-Grievous [...] (common). — A fretful child.
[UK]Newcastle Courant 3 Oct. 4/7: The ‘Peter Grievous’ touch indicates ‘pensive, deprecatory, accompanied by a cast-down look’.
Surry Mirror 23 Apr. 5/4: Their professed anxiety for public interests fizzles down into an absurd and exaggerated ‘Peter Grevous’ complaint.