What makes it so amazing, they have cop fighting about a "liter of cola" instead of a medium or large. Eating bars of soap. Good cop/bad cop things. Just over the top amazingness. There are all kinds of gags here and there, its just wonderful.
The plot? A bunch of Vermont cops are losing their jobs and they go undercover to figure out whats up. Its a gang of dirty cops vs. a group of dumb cops. If you haven't seen it and like crude (think South Park) style humor, you'll love this movie!