Lazy man’s load.  Lazy people frequently take up more
  than they can safely carry, to save the trouble of coming
  a second time.

Lazybones.  An instrument like a pair of tongs, for old or
  very fat people to take any thing from the ground without
  stooping.

Leaf.  To go off with the fall of the leaf; to be hanged: 
  criminals in Dublin being turned off from the outside of
  the prison by the falling of a board, propped up, and moving
  on a hinge, like the leaf of a table.  Irish term.

To Leak.  To make water.

Leaky.  Apt to blab; one who cannot keep a secret is said
  to be leaky.

Leaping over the sword.  An ancient ceremonial said to
  constitute a military marriage.  A sword being laid down
  on the ground, the parties to be married joined hands,
  when the corporal or serjeant of the, company repeated
  these words: 

      Leap rogue, and jump whore,
      And then you are married for evermore.

  Whereupon the happy couple jumped hand in hand over
  the sword, the drum beating a ruffle; and the parties were
  ever after considered as man and wife.

Least in sight.  To play least in sight; to hide, keep
  out of the way, or make one’s self scarce.

Leather.  To lose leather; to be galled with riding on
  horseback, or, as the Scotch express it, to be saddle sick. 
  To leather also meant to beat, perhaps originally with a
  strap:  I’ll leather you to your heart’s content.  Leather-
  headed; stupid.  Leathern conveniency; term used by
  quakers for a stage-coach.

Leery.  On one’s guard.  See peery.

Left-handed wife.  A concubine; an allusion to an
  ancient German custom, according to which, when a man
  married his concubine, or a woman greatly his inferior,
  he gave her his left hand.

Leg.  To make a leg; to bow.  To give leg-bail and land
  security; to run away.  To fight at the leg; to take
  unfair advantages:  it being held unfair by back-sword
  players to strike at the leg.  To break a leg; a woman who has
  had a bastard, is said to have broken a leg.

LEGGERS.  Sham leggers; cheats who pretend to sell smuggled
  goods, but in reality only deal in old shop-keepers or
  damaged goods.

Lenten fare.  Spare diet.

Letch.  A whim of the amorous kind, out of the common
  way.

Levite.  A priest or parson.

To Lib.  To lie together.  Cant.

LIBBEGE.  A bed.  Cant.

LIBBEN.  A private dwelling-house.  Cant.

LIBKEN.  A house to lie in.  Cant.