If you bust something, you break it or damage it so badly that it cannot be used.

If someone is busted, the police arrest them.

If police bust a place, they go to it in order to arrest people who are doing something illegal.

A company or fund that is bust has no money left and has been forced to close down.

If a company goes bust, it loses so much money that it is forced to close down.

A bust is a statue of the head and shoulders of a person.

You can use bust to refer to a woman's breasts, especially when you are describing their size.