The initial idioms of the letter F

first see the light of day	first step is always the hardest
first thing	first things first
first up	first world problem
firstest with the mostest	first-rate
fish	fish around
fish eye	neither fish, flesh, nor good red herring
fish for	fish for a compliment
fish for compliments	fish in troubled waters
fish or cut bait	fish out of
fish out of water	fish out of water, a
fish story	fish tale
fish to fry	fish out
fish up out of	FISHDO
fish-eating grin	Fishes
fish-fight	fishy