When somebody questions another and takes the opposite viewpoint on a particular subject in a way to provoke thinking, they play devils advocate. Asshole's advocate does the same, but makes himself look like a total fucking asshole.
Devils Advocate:
Jim: The government should really crack down on gun owners. With stricter laws, people would be safer from criminals.
Bob: Then what happens if the government takes away guns, and a criminal comes in with a weapon off the black market. What do you do? I'm just playing devil's advocate.
Asshole's Advocate:
Bill: I think I'll leave college a couple years early. I would be happier pursing my passion for art than I would getting my law degree.
Steve: Then what will you do when somebody says to your face that you're a fucking failure and an art bitch who flunked out of school? Then your shitty art goes nowhere and you can't get a job because you're fucking stupid. I'm just playing devil's advocate.
Bill: You're playing asshole's advocate you judgmental piece of crap.
The anus of a fish which, given that fish spend all their lives in water, would have to provide a very tight seal. Metaphorically, the term is usually used in conjunction with the words "tighter than a" to indicate that someone could hardly be more frugal with his spending.
Tom: "I never leave a tip when I eat out- even if the service was excellent".
Jerry: "Man, you are tighter than a fish's asshole".
The DMV (Department of Motor Vehicles). First used by comedian Dane Cook, it describes what it's like to wait in line for hours with no air conditioning with whiny kids, smelly cocksuckers, and peopletalking on their god damn cell phones, just so you can get your driver's license.