E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Secret or underhand mischief; a veiled rebuke; a bad deed probed by disguised means. To mich or meech means to skulk or shrink from sight. Michers are poachers or secret pilferers. Malicho is a Spanish word meaning an evil action; as a personified name it means a malefactor. (Hamlet, iii. 2.)
The quarto reads munching mallico; the folio has miching malicho. Qy. The Spanish mucho malhecho (much mischief)?