Saw.  An old saw; an ancient proverbial saying.

Sawny or Sandy.  A general nick-name for a Scotchman,
  as Paddy is for an Irishman, or Taffy for a Welchman;
  Sawny or Sandy being the familiar abbreviation or
  diminution of Alexander, a very favourite name among the
  Scottish nation.

Scab.  A worthless man or woman.

Scald MISERABLES.  A set of mock masons, who, A.D.
  1744, made a ludicrous procession in ridicule of the
  Free Masons.

SCALDER.  A clap.  The cull has napped a scalder; the
  fellow has got a clap.

Scaly.  Mean.  Sordid.  How scaly the cove is; how
  mean the fellow is.

Scaly fish.  An honest, rough, blunt sailor.

Scamp.  A highwayman.  Royal scamp:  a highwayman
  who robs civilly.  Royal foot scamp; a footpad who
  behaves in like manner.

To scamper.  To run away hastily.

Scandal broth.  Tea.

Scandal proof.  One who has eaten shame and drank
  after it, or would blush at being ashamed.

SCAPEGALLOWS.  One who deserves and has narrowly escaped
  the gallows, a slip-gibbet, one for whom the gallows
  is said to groan.

Scapegrace.  A wild dissolute fellow.

Scarce.  To make one’s self scarce; to steal away.

Scarlet horse.  A high red, hired or hack horse:  a pun
  on the word hired.

SCAVEY.  Sense, knowledge.  “Massa, me no scavey;”
  master, I don’t know (negro language) perhaps from the
  French SCAVOIR.

Scheme.  A party of pleasure.

Schism monger.  A dissenting teacher.

Schism shop.  A dissenting meeting house.

A scold’s cure.  A coffin.  The blowen has napped the
  scold’s cure; the bitch is in her coffin.

School of Venus.  A bawdy-house.

School butter.  Cobbing, whipping.

Sconce.  The head, probably as being the fort and citadel
  of a man:  from sconce, an old name for a fort, derived
  from a Dutch word of the same signification; To build a
  sconce:  a military term for bilking one’s quarters.  To
  sconce or skonce; to impose a fine.  Academical phrase.

Scot.  A young bull.

Scotch greys.  Lice.  The headquarters of the Scotch
  greys:  the head of a man full of large lice.

Scotch pint.  A bottle containing two quarts.

Scotch bait.  A halt and a resting on a stick, as practised
  by pedlars.

Scotch chocolate.  Brimstone and milk.

Scotch fiddle.  The itch.

Scotch mist. A sober soaking rain; a Scotch mist will
  wet an Englishman to the skin.