"Hubba-wha?" is an expression of disbelief or surprise, frequently uttered by The Muppets in various productions.
- Fozzie Bear uses the phrase as he does a take for Johnny Carson on a 1976 appearance on The Tonight Show.
- In episode 109 of The Muppet Show, Kermit utters "Hubba-hubba-what?" when he learns Gonzo's doing a costume act.
- Ma Otter utters the phrase multiple times in the blooper reel to Emmet Otter's Jug-Band Christmas. Richard Hunt makes fun of this during the taping of a Two-Headed Monster sketch (found on 40 Years of Sunny Days) having the Two-Headed Monster shout "Hubba-wha! Frank Oz!"
- Both Grover and Mr. Johnson both say the phrase when the find a pig they were going to cook can talk in a Monsterpiece Theater sketch.
- In a Good Morning America sketch, Howard Straightalk brings onto a show a chicken named Debbie Lynn Sweetcheeks Hubbawha.
- Elmo reacts this way when he learns the odd things Alan claims to have cooked in Elmo's Magic Cookbook.
- In a season 37 sketch with Elmo and Jamie Foxx, the phrase is uttered twice when a fox and a duck reveal their names to be "Jamie Foxx."
- A group of Triangle Lovers exclaim the phrase when Baby Bear proposes some changes to the club in a season 38 episode of Sesame Street.
- Elmo and Colin Farrell both say the phrase upon learning from Murray that the Word of the Day is "investigate." (First: Episode 4219)
- In the intro sequence to the "Super Grover 2.0" segments, Grover says the phrase when he sees a spider dangling alongside a skyscraper with him.
- A. B. C-more utters the phrase when he realizes he's been driving in the wrong direction in the racing portion of Elmo's Alphabet Challenge.
- Grover, Elmo and Cookie Monster react this way when seeing some sentient socks pass by (caused by one of Abby's failed spells) in Count on Elmo.