The initial idioms of the letter F

frighten the shit out of (someone)	frighten to death
frightened of (one's) (own) shadow	frightened to death
put the frighteners on	frill
fringe benefit	fringe
Frisco	fritter away
fritz	friz
frizz up	fro
toing and froing	frog face
frog in (one's) throat	frog in a small pond
frog in one's throat	frog slicing
frog	sang froid
from	from a mile away
from A to izzard	from A to Z
from away	from bad to worse
from can see to can't see	from coast to coast