Definition and background:
A term that refers to the movement of a drumstick after its initial stroke on the head of a drum. A bounce is the involuntary stroke or strokes of the drumstick that are a result of " bouncing " on the head of the drum. A experienced musician can control the number of bounces a drumstick will produce with each stroke.
For more information on the music term "Bounce" check out these other resources:
Wikipedia - Glossary of Musical Terminology
Virginia Tech Multimedia Music Dictionary
ORB -- Medieval Music Glossary