Also from Jackie Gleason, “One of these days, Alice!” and “To the moon!”
Ed Sullivan: “A really big shew”.
Johnny Carson: “I did not know that.”
Chandler from Friends - “I am SO not interested in that.” and “Could I BE any less interested in that?” Additional point for these - it is one of my least favourite anachronisms to see in period pieces - the writers of Friends invented these in the 90’s - people were not saying them previous to that.
Monica from Friends - “I KNOW!” (I can’t really reproduce the somewhat shrieky tone she says it in, but if you’ve watched the show, you know what I mean.)
Phoebe from Friends - “Oh no.” - sort of tailing off and disappointed/realizing something bad sounding - again, hard to describe the tone, but you know what I mean.
Fascinating.
**Rhoda: ** “Hello, this is Carlton, your doorman”
**The Brady Bunch: ** “Marcia, Marcia, Marcia!”
F Troop: “I’m warning you, Dobbs!”, “WHO SAYS I’M DUMB?”, “Please, Jane, not in front of the men!”
Abbott and Costello : “HEY ABBOTT!”
From the world of cartoons:
Rocky and Bullwinkle : “Hokey Smoke!”, “Hey Rocky, watch me pull a rabbit out of my hat!”
Beany and Cecil: “What The Heck!”, “DJ, you Dirty Guy!”, “Nyah-ah-ah!”
Tennessee Tuxedo: “Tennessee Tuxedo will not fail!”, “Duh, sorry, Tennessee”
Underdog: “There’s no need to fear, Underdog is here!”, “When Polly’s in trouble, I am not slow, it’s hip-hip-hip and awaaaaay I go!”, “Simon says…”
Super Chicken (& Fred): “Roger Wilcox!”, “You knew the job was dangerous when you took it!”
Looney Tunes: “What’s up, Doc?”, “You’re despicable”, many others.
And, for now, “Th-th-th-that’s all, folks!” 
Brain: “Are you thinking what I’m thinking?”
NARF! 
Psst! Are you pondering what I’m pondering?
Well, by gosh. You’re right!
There go my plans to take over the world.
Anyone know the origin of “That’s what she said?”
Was it just the punch line of some old joke or something?
Or did it originate with this character?
Sledge Hammer: “Trust me. I know what I’m doing.”
Columbo…“One more thing…”
Scrubs…it’s the musical cue they play when the plot it about to get preachy. They even spoofed it in one of the episodes.
I thought of the robot from “Lost in Space,” “Warning, Warning, Warning”
But didn’t most of the othe characters say “Up your nose with a rubber hose?” That wasn’t just limited to Vinnie was it? Even Kotter said it didn’t he? Or am I remembering it wrong?
I got a couple more:
South Park: (Stan) I learned something today
You killed Kenny
(Loch Ness Monster) That’ll be tree fitty
Happy Days: Sit on it
Hogan’s Hero’s: (SGT Schultz): I know nothing
SSG Schwartz
Tattoo: De plane! De plane!
LaughIn was full of them:
Dan Rowan: Look that up in your Funk and Wagnalls
Dick Martin: You bet your sweet bippy.
Arte Johnson (as a German soldier): Very intershtink, but shtupid.
Lily Tomlin as Ernestine the telephone operator: One ringy-dingy. Two ringy-dingies. . .
Lily Tomlin as Edith Ann: And that’s the twuth, pfththththth!
Flip Wilson as Geraldine: What you see is what you get!
Electric Company: HEEEEEEEY YOU GUUUUUUUUYS!!!
Also Stephanie: “How rude!”
Oh, another Flip Wilson one: The Devil made me do it.
The Waltons: Goodnight, Johnboy
And how could we leave out Ed McMahon: Heeeeeeeere’s Johnny!
Uncle Walter " And thats the way it is"
That’s the first thing I thought of when I saw this thread!!
Here’s another show-in-a-show catchphrase that’s a bit obscure from the short-lived Ben Stiller Show:
Skank: “Shut your stinkin’ trap!!” (uproarious laughter from studio audience)
Jerry Seinfeld: “Oh…that’s a shame…”
Kramer: “Giddyap!”
Steve Urkel: “Did I do that??”
Fonzie: “Heeeyyyyy”
Ralph Malph: “Sit on it, Potsie”
The Cheers Bar: “NORM!!!”
Captain Jean-Luc Picard: “Engage” or “Make it so”
Yeah, pretty much all of the characters said this…one time Mr. Woodman said it and it brought down the house!
MST3000 We’ve got movie sign!
Push the button Frank