noun

1. the snap made by a finger which is held down toward the palm by the thumb and then suddenly released
2. a light blow or tap given in this way
3. anything that stimulates or livens up; piquant element

Etymology: echoic extension of flip: see chirrup, chirp

transitive verb

1. to strike, impel, or snap with a fillip
2. to stimulate or liven up

intransitive verb