expression

fly by: Idiom Meaning and Origin

flog the log: Idiom Meaning and Origin

flog the dolphin: Idiom Meaning and Origin

flesh out: Idiom Meaning and Origin

first off: Idiom Meaning and Origin

first and last: Idiom Meaning and Origin

first among equals: Idiom Meaning and Origin

find one’s voice: Idiom Meaning and Origin

find one’s tongue: Idiom Meaning and Origin

fill someone’s shoes: Idiom Meaning and Origin

fill one’s boots: Idiom Meaning and Origin

fill in the blank: Idiom Meaning and Origin