[flame] See: [ADD FUEL TO THE FLAME], [GO UP IN FLAMES].

[flanker back] {n.} A football back who can play far to […]

[flare up] {v.} 1. To burn brightly for a short time […]

[flare-up] {n.} The reoccurrence of an infection or an armed conflict. […]

[flash] See: [IN A FLASH].

[flash card] {n.} A card with numbers or words on it […]

[flash in the pan] {n. phr.}, {slang} A person or thing […]

[flasher] {n.} Someone who indecently exposes oneself.

[flat] See: [FALL FLAT], [IN NO TIME] or [IN NOTHING FLAT], […]

[flat as a pancake] {adj. phr.} Very level; very flat; having […]