fingerboard
A tiny skateboard you move with your fingers.
A fingerboard is a miniature skateboard, usually about as long as your finger, that you control with your fingertips instead of your feet. You use your index and middle fingers like legs, performing tricks on tiny ramps, rails, and obstacles built to scale. When you pop an ollie with a fingerboard, your finger movement mimics the foot position of a real skateboarder.
Fingerboarding started in the 1970s when skateboarders wanted to practice tricks indoors. Today, serious fingerboarders compete in contests, film videos of complex trick combinations, and customize their boards with real grip tape, ball-bearing wheels, and wooden decks, just like full-sized skateboards.
The word can also describe the long, flat part of a guitar or violin where you press down the strings to change notes. This fingerboard is also called a fretboard on guitars, and it's where all the finger action happens when a musician plays.