Volleyball has numerous terms and slang phrases of which dump, floater, joust and wipe are only a handful. Volleyball is played with six team members in two rows, three in front and three in back.
Dump: A surprise attack usually executed by a front row setter to catch the defense off guard and aimed at the donut (area 4) on the volleyball court. (Note: the setter is the player who sends the ball into the opponent’s portion of the volleyball court by doing a ‘dump’ on the second touch of the ball – only three are allowed per side.)
Floater: A serve in which the ball follows an erratic path since it has no spin.
Joust: The situation where the ball is landing right on top of the net and one player one from each side jumps up and pushes against it, trying to push it on to the opponent’s side.
Wipe (also known as a tool): When a player deliberately spikes the ball off an opponent, sending it out of bounds.
I found a few sites that had lists of the different terms and phrases used in Volleyball (Wikipedia: Volleyball Jargon; Gold Medal Squared; Facts.net) and I’m guessing those knowledgeable in the sport are likely to know even more of them!