Green’s Dictionary of Slang

mumphazard n.

[mumps n. (1); the pvb origin is attrib. to Cheshire speakers ]
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a sulky, silent individual.

J. Phillips [trans.] Cervantes Don Quixote 170: Sancho [...] stood like Mumphazard, that was hang’d for saying nothing, pensive, melancholy, stupid, and all-besotted.