Who's The Most Annoying "Funny" Side Character Of All Time?

Almost every TV, movie or book series has to have them — the comic relief characters. The silly nerd who sits in the corner and makes in-jokes. The bumbling weirdo. But who's the most annoying "funny" supporting character in all of science fiction or fantasy?

Please include a picture or clip, or book cover, showcasing this annoying buffoon. And please mention his or her name, where he or she appears, and why they're so annoying. Thanks!

Top image: Neelix from Star Trek: Voyager. Between his weird love life, the annoying cooking, and the homely lessons he dispenses as "morale officer"... actually, it's mostly the voice. He's just too cutesy and grating.