1. To enter an area in a particularly loud over-the-top fashion, usually breaking something on the way in. Sometimes performed utilizing the Sparta Kick. SWAT teams generally perform this with a battering ram.
"the SWAT team had no other option than to fuckbust their way in the house using flashbangs and a battering ram."
Phil: It's a good thing you weren't at the party last night.
Steve: Why's that?
Phil: Because the police decided to fuckbust their way into the house at 2 am just as Jim was about to leave. They kicked the door open so hard they broke his face in three places.