Verbal Tic/Web Original

Examples of Verbal Tic in Web Original works include:

Keiji Tanaka of Survival of the Fittest did this with "Like (something) and stuff". A lot. As in 'At least once in almost every sentence,' a lot.
In The Guild, Zaboo often ends his sentences by taking one of the words from the sentence he just spoke and tagging on 'd. "I know every floor plan of every place where you've ever lived... floor-plan'd."
The Kobolds of Unforgotten Realms often say "kobold" when they're talking. Or for (seemingly) no reason. Hell, all a person has to do to speak the "language" of the Kobolds is to say nothing but "kobold".
Slowbeef during the second Kaizo Mario World Retsupurae and the 1st I Wanna Be The Guy Retsupurae. Here are the tics:

In Yu-Gi-Oh the Abridged Series, the ridiculously stereotypical American Bandit Keith from Yu-Gi-Oh! adds "In America!" to the end of most of his sentences. Parodied in the episode where he duels Joey; as Joey plays Copycat, he declares, "This lets me copy your Catch Phrase... in America!"
- It was also parodied in Keith's second appearance, where during a duel between Joey and Zombie Boy Keith gloats how Joey will be defeated only for the latter to reply "Let me guess...'in America', right?" Keith defensively responds "I wasn't going to say that! ...(inamerica)."
- Also, Kemo (Pegasus' henchman, known as the "Nameless Henchman" in the series) constantly begins his sentences with "Attention, Duelists!" and narrates his actions and moods in the third person - but replacing references to himself with his (spectacularly pointy) hair. For instance, "My hair is inviting you to enter the castle!" or "Attention, duelists! My hair is assaulting you!" At one point, Keith and Kemo run into each other...

Keith: [thinking] Man, that guy sure likes talking about his hair.
Kemo: [thinking] Man, that guy sure likes talking about America.

- Same with Mai Valentine, who refers to herself as "My breasts".
- Tristan does the same thing with "My voice", though not nearly as often.
- Joey very often goes "NYEH!" for no reason, as a sort of sound for all occasions. It's been noted that he himself has no idea he's doing it, and seems not to hear it at all, wondering what Bakura means when he references the Nyeh-sound.
  - Taken to extremes in one episode where, after being called out on his nyeh-ing, he then proceeds to sing the entire Abridged theme song in nyehs, ending with "Still not hearing it."
Agamemnon Tiberius Vacuum has a weird verbal tic in which his speech is sometimes slowed, sometimes sped up, sometimes even reversed.
Chuggaaconroy says "Whatever" in his Let's Plays a lot, often without him noticing. He tries to cut back on it, but hasn't succeeded.
Mitchell, in the MSF High Forums and MSF High IRC, has an interesting one, in AIM chat and IRC. He tends to surround 'action' posts with '8action8'. This is due to a incorrectly working shift key, which doesn't register his attempt to post '*action*'.
"Welcome to my Glory, hyuuuumaaaan...."
Raocow has a lot, including "that's pretty great" and "oh man!"