What is "vibraslap"

n. A percussion instrument, desendant of the jawbone, made of stiff wire connecting a wood ball to a block of wood with metal teeth inside, which when struck, creates a rattle sound.

The vibraslap is a percussion instrument consisting of a piece of stiff wire (bent into a U-shape) connecting a wood ball to a hollow box of wood with metal “teeth” inside. The percussionist holds the metal wire in one hand and strikes the ball (usually against the palm of their other hand). The box acts as a resonating body for a metal mechanism placed inside with a number of loosely fastened pins or rivets that vibrate and rattle against the box. The instrument is a modern version of the jawbone.