To mop up.  To drink up.  To empty a glass or pot.

Moped. Stupid, melancholy for want of society.

MOPSEY.  A dowdy, or homely woman.

MOPSQUEEZER.  A maid servant, particularly a housemaid.

MOPUSSES.  Money.

MORGLAG.  A brown bill, or kind of halbert, formerly
  carried by watchmen; corruption of more, great or broad,
  and Glave, blade.

Morning drop.  The gallows.  He napped the king’s pardon
  and escaped the morning drop; he was pardoned, and
  was not hanged.

Morris.  Come, morris off; dance off, or get you gone.
  allusion to morris, i.e.  Morisco, or Moorish dancing.

Mort.  A woman or wench; also a yeoman’s daughter.  To
  be taken all-a mort; to be confounded, surprised, or motionless
  through fear.

Moses.  To stand Moses:  a man is said to stand Moses
  when he has another man’s bastard child fathered upon
  him, and he is obliged by the parish to maintain it.

Moss.  A cant term for lead, because both are found on the
  tops of buildings.

Mossy face.  The mother of all saints.

Mot.  A girl, or wench.  See mort.

Mother, or the mother.  A bawd.  Mother abbess: 
  the same.  Mother midnight; a midwife.  Mother in
  law’s bit; a small piece, mothers in law being supposed
  not apt to overload the stomachs of their husband’s children.

Mother of all saints.  The Monosyllable.

Mother of all souls.  The same.  Irish.

Mother of st. Patrick.  The same.  Irish.

Mother of the maids.  A bawd.

MOUCHETS.  Small patches worn by ladies:  from the French
  word mouches.

MOVEABLES.  Rings, watches, or any toys of value.

Mouse.  To speak like a mouse in a cheese; i.e. faintly or
  indistinctly.

Mousetrap.  The parson’s mousetrap; the state of matrimony.

Mouth.  A noisy fellow.  Mouth half cocked; one gaping
  and staring at every thing he sees.  To make any one
  laugh on the wrong, or t’other side of his mouth; to make
  him cry or grieve.

Mouth.  A silly fellow.  A dupe.  To stand mouth; i.e.
  to be duped.

To mow.  A Scotch word for the act of copulation.

Mow Heater.  A drover:  from their frequent sleeping on
  hay mows.  Cant.

Mower.  A cow.

Muck.  Money; also dung.

Muckworm.  A miser.

MUCKINDER.  A child’s handkerchief tied to the side.

Mud.  A fool, or thick-sculled fellow; also, among printers
  the same as dung among journeymen taylors.  See
  dung.