In volleyball terms, bump is a way of hitting the ball. A bump usually occurs with two interlocked hands from underneath the ball, and generally is used to keep the ball from hitting the ground.
The most significant terms in volleyball are spike, serve, footfault, set and bump
To ready the player to bump, set, or spike.
The volleyball bump is "la manchette" (feminine noun, from manche - sleeve) in French.
The purpose of a bump is to pass it to the setter so that she/he can set it to the hitter. However, it may be used differently; for example, if the setter bump-sets.
It is when the ball is hit of your forearms, it is usually the first move used in volleyball.
smash a bump and a volley