[first-class] (1) {adj.} 1. Of the highest class or best kind; […]

[first-run] {adj. phr.} Shown for the first time; new. * /The […]

[first-string] {adj.}, {informal} 1. On the starting team or A team. […]

[firsthand] {adj.} Fresh; genuine; from the original source. * /John says […]

[fit] {adj.} sexually attractive (Afro-Carribean).

[fit as a fiddle] {adj. phr.} In very good health. * […]

[fit to be tied] (1) {adj. phr.}, {informal} Very angry or […]

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

[flat-footed] {adj.}, {informal} 1. Straightforward; forthright; direct; outright. * /The governor […]

[flip-flop] (3) {adj. phr.}, {informal} Involving or using a change from […]