Definition of "swasher"

As young as I am, I have obſeru'd theſe three Swaſhers: I am Boy to them all three, but all they three, though they would ſerue me, could not be Man to me; for indeed three ſuch Antiques do not amount to a man: [...]

1599, William Shakespeare, “The Life of Henry the Fift”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene ii], page 78, column 1

[I]f they keepe their wits, yet they are accompted fooles by reaſon of their carriage, becauſe they cannot ride a horſe, which euery Clowne can doe; ſalute and court a Gentlewoman, carue at table, cringe and make congies, which euery common ſwaſher can doe, [...]

1624, Democritus Junior [pseudonym; Robert Burton], “Loue of Learning; or Ouer-much Study. With a Digression of the Misery of Schollers, and Why the Muses are Melancholy.”, in The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps, partition 1, section 2, member 3, subsection 15, page 113