[filthy lucre] {n.}, {informal} Money, especially when thought of as bad […]

[fine-tooth comb] {n. phr.} Great care; careful attention so as not […]

[finger in the pie] also [finger in every pie] {n. phr.}, […]

[firebug] {n.} An arsonist; one who willfully sets fire to property. […]

[firing squad] {n.} A group of soldiers chosen to shoot a […]

[first base] {n. phr.} 1. The base that must be touched […]

[first class] {n.} 1. The first rank; the highest class; the […]

[first cousin] {n.} The child of your aunt or uncle. * […]

[first string] (1) {n.}, {informal} 1. The best group of players […]

[fish fry] {n.} An outdoor party or picnic at which fish […]