It sounds like you're looking for a GIF related to the phrase "Who do you think you are?" — a popular expression often used to challenge someone's attitude or behavior.

Here are some ways you can find such a GIF:

1. Giphy
   Visit Giphy.com and search for "Who do you think you are" or simply "Who do you think you are GIF." You'll find many animated reactions from movies, TV shows, and memes.

2. Tenor
   Go to Tenor.com and enter the same search phrase. Tenor is great for finding expressive and popular GIFs.

3. Social Media Platforms
   Apps like Twitter, Instagram, or Facebook often have built-in GIF search tools powered by Giphy or Tenor. Just tap the GIF button and type your phrase.

Popular GIFs for this phrase often feature:

• Characters from TV shows like The Office (Michael Scott or Dwight Schrute)
• Dramatic movie scenes
• Sassy or sarcastic reactions

If you'd like, I can help you find a direct link to a specific GIF or suggest one based on a particular show or mood! Just let me know.