French cream.  Brandy; so called by the old tabbies
  and dowagers when drank in their tea.

French disease.  The venereal disease, said to have been
  imported from France.  French gout; the same.  He suffered
  by a blow over the snout with a French faggot-stick;
  i.e. he lost his nose by the pox.

French leave.  To take French leave; to go off without
  taking leave of the company:  a saying frequently applied
  to persons who have run away from their creditors.

Frenchified. Infected with the venereal disease.  The
  mort is Frenchified:  the wench is infected.

Fresh milk.  Cambridge new comers to the university.

Freshman.  One just entered a member of the university.

Fribble.  An effeminate fop; a name borrowed from a
  celebrated character of that kind, in the farce of Miss in her
  Teens, written by Mr. Garrick.

Friday-face.  A dismal countenance.  Before, and even
  long after the Reformation, Friday was a day of abstinence,
  or jour maigre.  Immediately after the restoration of king
  Charles ii. a proclamation was issued, prohibiting all
  publicans from dressing any suppers on a Friday.

To frig.  Figuratively used for trifling.

Frig pig.  A trifling, fiddle-faddle fellow.

Frigate.  A well-rigged frigate; a well-dressed wench.

Frisk.  To dance the Paddington frisk; to be hanged.

To frisk.  Used by thieves to signify searching a person whom they have robbed.  Blast his eyes! frisk him.

Froe, or VROE, A woman, wife, or mistress.  Brush to your
  froe, or bloss, and wheedle for crop; run to your mistress,
  and sooth and coax her out of some money.  Dutch.

FROGLANDER.  A Dutchman.

Frosty face.  One pitted with the small pox.

Frog’s wine.  Gin.

Fruitful Vine.  A woman’s private parts, i.e. that has
  flowers every month, and bears fruit in nine months.

FRUMMAGEMMED. Choaked, strangled, suffocated, or
  hanged.  Cant.

FUBSEY.  Plump.  A fubsey wench; a plump, healthy
  wench.

Fuddle.  Drunk.  This is rum fuddle; this is excellent
  tipple, or drink.  Fuddle; drunk.  Fuddle cap; a drunkard.

Fudge.  Nonsense.

FULHAMS. Loaded dice are called high and lowmen, or
  high and low fulhams, by Ben Jonson and other writers of
  his time; either because they were made at Fulham, or from
  that place being the resort of sharpers.

Full of emptiness.  Jocular term for empty.

Full march.  The Scotch greys are in full march by the
  crown office; the lice are crawling down his head.