I don't know. Probably the acronym for what it was called in Chinese (it's a hong kong film).
Basic story: Sammo Hung (Jackie Chan's big fat friend) is a ruthless crime boss who brutally murders the only witnesses to a trial he's in, and almost kills the cop who was assigned to protect them.
Now, that cop finds out he has brain cancer, just days before his retirement.
It turns out, though, that this cop and his team are the "The Shield" team of Hong Kong. They're not quite uncrooked, if you get my drift, and all of them have something to hide, so they're doubly under the gun when top cop Donnie Yen (Iron Monkey) is assigned to take the lead cop's place.
Through a series of circumstances too complicated to explain, everyone dies at the end. Mostly.