Nikki and John: Pranksters in Love - John frequently starts off videos by saying "What's going on guys, John here." and Nikki usually responds to getting pranked with "Are you f*cking kidding me right now?" At the end of videos, if John was pranked, a sound byte of John saying "Nikki, what did you do?!?!?" will play, while if Nikki was pranked, a sound byte of Nikki saying "Well that's just great!" will play.
Spoofed a few times on Homestar Runner. In Strong Bad's "crazy cartoon" "Sweet Cuppin' Cakes", the character of Eh! Steve seems to exist only to say his Catch Phrase, which is also his name ("Eh! Steve!"). At the end of the Strong Bad Email "the facts", Homestar says he's decided to change his Catch Phrase from "Seriously" to "That's bupkis!" Strong Bad used to say "Holy Crap!" with some regularity, as well, but due to inverse-Flanderization, he's been weaned off that aspect of his personality, and now groans whenever the word 'crap' comes up in an email.
Although he then began regularly yelling "DELETED" as he did so to many of the e-mails he was sent.
Parodied again with the Cheat Commandos, whose original Catch Phrase was "Cheat Commandos... rock rock on!"
Edward Salinas: "We will build a stronger community."
The Hymn of One: "The Hymn of One is fun!"
KateModern: After footage from a sex tape featuring him finds its way onto the Internet, Gavin accidentally gains the catchphrase "Keep your socks on!" At first he is somewhat embarrassed, but he quickly embraces it.
Later, there's also Tez On Toast, with his insistance on the need to "finish people off".
Dr. Horrible: I'm Dr. Horrible. I've got a PhD in horribleness!
Moist: Is that the new catch phrase?
Also NOTLampshaded by Captain Hammer: "The hammer is my penis."
...and Penny: "Captain Hammer will save us."
The Angry Video Game Nerd has a few. "What were they thinking?!" is arguably his most famous ones, but his other well known ones include "What a shitload of fuck" and "I am dead fucking serious".
Silly bitches, your weapons cannot harm me, don't you know who I am? I'm The Juggernaut, bitch!
"RANDOM GRATITIOUS BREAST SHOT" and "RANDOM ACT OF VIOLENCE AGAINST (something/someone)!" from badmovies.org
"Nya" from the Process Forum.
"(something) VS (that something)'s weight in (something else, usually chihuahuas)", "The (x) Jihad (There Is No Jihad)", "Hotbranch 3:16", "COW!", "Star Trek/The French Must Lose" and "The Simpsons/Star Wars Must Always Win" from WWWF Grudge Match.
From the old CBUB, "Spanked like a four year old at K-Mart" and "Fat skanky redneck chicks". From the new CBUB, "It ends in sex".
"Cinematography" in the Agony Booth
"Is this based on a book?" in imdb.com
Fine Bros Spoilers:
"X and Y end up together!" (or don't, largely thanking God for Woody Allen)
"Just like in real life! Who would have guessed it?"
"X and Y live (sing-songy) HAPPILY ever AFTER!!"
"Why the hell are there remakes?!"
And the following were added for their Youtube Spoilers!
"...aaaaaand it turned out to be fake." or "...Buuuuut some people think it's fake."
"And we all X at his/her Y (mainly laugh at his/her embarrassment) BECAUSE WE'RE SUCH GREAT PEOPLE!"
The Chick used to have "I'm The Nostalgia Chick. I remember it, because the dudes won't," but later dropped it, revealing in an interview that she thought it was sending the message that girly movies didn't deserve to be remembered by guys.
Obscurus Lupa, during her reviews of Charmed, frequently repeats two truths about the show: "The Elders are dicks!", Daryl's "Aw, meng!", and "If it sounds like a good idea, Charmed will find some way to make it stupid." Also, when doing her Radu impression, she'll usually have at least one exclamation of, "Aw, damneet!"
Husky Starcraft: "Hello everyone, this is H-to-the-usky Husky here!"
Barry "The Blender" Henderson from the online Irish comedy series I Am Fighter has "What about you?". The phrase is (somewhat obscure northern) Irish slang for "How are you"? Of course, since the series has become so widely recognised in Ireland (moreso in the the North), the phrase has exploded in popularity. Barry's thick culchie accent makes it sound more like "Whadda boutchee?". It's frequently shortened to "Boutchee?", even by the man himself.
"...and then you put in the oven, and then you win!"
Dribble on that bar-be-que SAUUUUUWWS!
Several of the characters in the Global Guardians PBEM Universe had a Catch Phrase. The most notable were probably Force's "Okay, I want to try something..." right before he did something phenomenally stupid. This was almost always followed up by Recoil's "Great... Force is unconscious again."
The early Kids React videos had Lia describing everyone as "Creepers!" with accompanying hand movements. She stopped doing this after "Kids React to Minecraft" due to the explanation to her that some viewers confused her as a Minecraft player before then.
Twenty-five years of morning radio will also cause Brian, much to his annoyance, tell people "Good Morning" from force of habit even though they record well into the afternoon. He's adapted this to "Good morning, afternoon, evening or whenever you're listening."
Eat Your Kimchi has several catch phrases that have become popular among fans:
I lost my pants, in rippito fippito sippi slowmotion!
Soy un Dorito!
Lumpy from Happy Tree Friends always says "Mmm hmm" after he thinks he's done something right.
Each member has their own, but the word "Brown" is used commonly by all of the Creatures, meaning bad, stinky, or used in place of a curse word. It was first said by Sp00n, but Kootra has since taken it, as he uses it the most. Also, the Creatures have said multiple times that it is in no way racist.
"MLG" when describing how good they are at a game (even if they aren't). This pokes fun at Major League Gaming circuits and serious gamers.
"I don't follow [X] news." used when someone doesn't know something or is corrected, the original being 'I don't follow Skyrim news'.
"Cheese it!" when the Creatures are running away or escaping from something in the game.
"High horse" used mostly by Nova, Seamus, and Sly. It's used to describe something that is very large, lavish, and/or over the top.
Critikal: He opens most videos with "What's up everybody this is Critikal, I'm playing [game he's playing at the time], this is for [platform]. Let's do this shit!" and he usually ends each video with "Well that's the end of this video, remember to rate the video, comment the video, and subscribe if you want to see videos similar to this one. See ya."
Marek vs. Wyshynski: "Let's start the show, proper, shall we?", a result of the show's tradition to stretch their cold open for as long as possible.
Eddsworld has several, from more than one character.
"That's almost a hundred..."Explanation: At various points throughout YGS' history, he's said something along the lines of "Episode X? That's almost a hundred!" It's only recently passed 50 episodes.
":a what a fucke?!" Explanation Ever since this entry from episode 21, he's used this sound bit/video clip/quote whenever he comes across a particularly baffling comment. Behold,all of them.
"Oh, Olga!" Explanation Fellow YouTuber/IRL friend Olga Kay, of Russian descent, has some trouble with the english language in written form (she's fluent in speech) despite living here for quite a few years, and Jack features one of her comments every once in a while in an episode of YGS, followed by him exclaiming "Oh, Olga!" He even slipped one into the Christmas Special, which is a song.
"Help me clean up YouTube! If you see an amazingly bad comment on the Internet, take a screencap of it and send it my way either via Twitter or my Facebook fanpage." Explanation His plug at the end of every episode for sending him possible YGS entries. He eventually turned it into a jingle.