To run full speed into somebody and body slam them into a brick wall, chain link fence, or similar immovable object.

To run up on someone usually with multiple people and proceed to assault them. This method is generally a surprise to the victim and can result in their belongings being taken and them being stomped.

To attack someone or something by wildly charging them full force with no sort of tact or skill other than one's own momentum and possibly the backs and sides of their fists as they randomly flail them out of rage, but certainly consisting of no precisely swung blows.

To run full speed into somebody and body slam them into a brick wall, chain link fence, or similar immovable object.

The act of attacking someone or something (usually by a group)with the reckless abandon and fervor of one who has nothing to loose.

1) (n) Crash the gates of a show with a pack of people, in the hope to get in without having to pay. "Yo! Bumrush the show" -- Public Enemy. (Yo! Bumrush the show) 1987.
2) (v) To get beaten up by a large, angry group of people. Literally to get rushed by bums or lowlifes.

Bum rush, A word describing scrambling like homeless people after money. Usually used to describe a mugging.