flippantly

flirtatiously

flop

floridly

fluently

flush

focally

fondly

foolishly

for 24 hours

for a bargain price

for a song

for a while

for all intents and purposes

for all practical purposes

for all the world

for any price

for anything

for certain

for dear life

for each one

for example

for free

for fun

for good

for good measure

for instance

for keeps

for love or money

for one