to flop down

Flop into the beanbag chair!

flop house

Florence is the most beautiful city in Italy.

Florida green

flotsam and jetsam

to flounce out of a room

Flour is sold by the kilogram

flourishing concern

It is flourishing.

to flout

to be a flower of the female sex

fluent in spoken and written ...

fluent in written and spoken ...

to fluff up

by a fluke

fluky

to flunk

to flunk out of school

in a flurry of excitement

to be in a flutter

to flutter one’s eyelashes

to flutter the dovecotes

to fly into a rage

to fly off the handle