[forever and a day] {adv. phr.}, {informal} For a seemingly endless […]

[forty winks] {n. phr.}, {informal} A short period of sleep; a […]

[foul up] {v.}, {informal} 1. To make dirty. * /The birds […]

[foul-up] {n.} (stress on "foul") 1. {informal} A confused situation; confusion; […]

[fourth world] {n.}, {informal} The poor nations of the world, as […]

[fraidy-cat] or [fraid-cat] or [scaredy-cat] or [scared cat] {n.}, {informal} A […]

[freeze out] {v.}, {informal} To force out or keep from a […]

[from scratch] {adv. phr.}, {informal} With no help from anything done […]

[front office] {n.}, {informal} The group of persons who manage a […]

[full of oneself] {adj. phr.}, {informal} Interested only in yourself. * […]