An inept ambulance chaser, that the Simpsons keep hiring as their lawyer (a fact remarked on by Marge in a typically self-aware aside).
Lionel Hutz works for "I Can't Believe It's A Law Firm".
Some examples of Hutzisms:
"Your honor, I call for a, uh, bad court thingey."
"You mean a mistrial?"
"Right. That's why you're the judge and I'm the, uh, law talking guy."
"Wow - these books behind me don't just look good - they're filled with useful legal tidbits!"