Direct answer: In Full House, the catchphrase “How rude!” is most commonly associated with Stephanie Tanner, though there’s user memory and fan discussion about whether Michelle ever echoed it. The line is widely recognized as Stephanie’s, especially in seasons where she playfully heckles others. Context and details

• Stephanie’s hallmark line: “How rude!” is frequently cited in fan discussions and clips as Stephanie Tanner’s signature retort, aligning with her cheeky, firmly-voiced attitude on the show.

• Michelle’s more famous catchphrase: “You got it, dude!” is typically remembered as Michelle’s iconic line, not “How rude!”, which reinforces the common memory that Stephanie said it more often.

• Episodes and clips: Multiple video compilations and episode rundowns highlight Stephanie delivering “How rude!” in various scenes, supporting the association with her character. There are also fan-generated resources and GIFs linking the phrase to Stephanie.

• Pop culture memory: The phrase has persisted in memes and fan culture as a Stephanie catchphrase, though some fans recall occasional cross-character usage or mirrors by others in playful moments.

If you’d like, I can pull specific episode references or timestamped clips where Stephanie says “How rude!” to help you verify in your preferred source or context.