Lobster.  A nick name for a soldier, from the colour of his
  clothes.  To boil one’s lobster, for a churchman to
  become a soldier:  lobsters, which are of a bluish black,
  being made red by boiling.  I will not make a lobster
  kettle of my ****, a reply frequently made by the nymphs
  of the Point at Portsmouth, when requested by a soldier
  to grant him a favour.

Lock.  A scheme, a mode.  I must fight that lock; I must
  try that scheme.

Lock.  Character.  He stood a queer lock; he bore but an
  indifferent character.  A lock is also a buyer of stolen
  goods, as well as the receptacle for them.

Lock hospital.  An hospital for venereal patients.

Lock up house.  A spunging house; a public house kept
  by sheriff’s officers, to which they convey the persons they
  have arrested, where they practise every species of
  imposition and extortion with impunity.  Also houses kept
  by agents or crimps, who enlist, or rather trepan, men to
  serve the East India or African company as soldiers.

LOCKERAM-jawed. Thin-faced, or lanthorn-jawed.  See
  lanthorn jawed.

LOCKSMITH’S daughter.  A key.

Loggerhead.  A blockhead, or stupid fellow.  We three
  loggerheads be:  a sentence frequently written under two
  heads, and the reader by repeating it makes himself the
  third.  A loggerhead is also a double-headed, or bar shot
  of iron.  To go to loggerheads; to fall to fighting.

Loll.  Mother’s loll; a favourite child, the mother’s darling,

Loll tongue.  He has been playing a game at loll tongue;
  he has been salivated.

LOLLIPOPS.  Sweet lozenges purchased by children.

To lollop.  To lean with one’s elbows on a table.

LOLLPOOP.  A lazy, idle drone.

Lombard fever.  Sick of the lombard fever; i.e. of the
  idles.

Long one.  A hare; a term used by poachers.

Long.  Great.  A long price; a great price.

Long Gallery.  Throwing, or rather trundling, the dice
  the whole length of the board.

Long Meg.  A jeering name for a very tall woman:  from
  one famous in story, called Long Meg of Westminster.

Long shanks.  A long-legged person.

Long stomach.  A voracious appetite.

Long tongued. Loquacious, not able to keep a secret. 
  He is as long-tongued as Granny:  Granny was an idiot
  who could lick her own eye.  See granny.

Long-winded. A long-winded parson; one who preached
  long, tedious sermons.  A long-winded paymaster; one
  who takes long credit.