long in the tooth

a little of something goes a long way

Only a small amount of something is usually required to produce a great effect.

a week is a long time in politics

In politics, much change can occur in a short space of time.

an eye for an eye, a tooth for a tooth

compensation for injury caused by a person, in the form of inflicting of an identical injury on that person.

as the day is long

Unceasingly; very; thoroughly; to a very high degree.

clean as a hound's tooth

Very clean.

come a long way

To make significant progress.

draw a long bow

To lie; to exaggerate.

draw the long bow

To exaggerate; to tell tall tales.