Fillip (noun)

1. A thing that adds interest or excitement to something.
2. A movement made by bending the last joint of the finger against the thumb and suddenly releasing it; a flick.
3. A snap of the finger and thumb together.

Origin:

From french; related to filer 'to spin, file'.

Examples:

1. The success of the company gave a fillip to the stock market.
2. With a fillip of his wrist, he sent the coin spinning into the air.
3. She gave her hair a fillip to make sure it was neat.