slam dancing

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A style of dancing, usually performed to punk rock, in which participants intentionally collide with one another.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A form of dancing, to punk rock music, in which the dancers deliberately collide with each other
• verb Present participle of slam dance.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a form of dancing in which dancers slam into one another; normally performed to punk rock