These "Phineas and Ferb" running gags will give you a serious déjà vu moment. For this list, we’ll be looking at the funniest and most memorable recurring jokes from this animated Disney series. Our countdown includes Doofenshmirtz's evil jingle, whatcha doin, the secret agent fedora, and more! What's YOUR favorite "Phineas and Ferb" running gag? Let us know in the comments!

Watch more great "Phineas and Ferb" videos here:
Top 10 Best Phineas and Ferb Songs -    • Top 10 Best Phineas and Ferb Songs  
Top 10 Funniest Phineas and Ferb Moments -    • Top 10 Funniest Phineas and Ferb Moments  
Top 10 Cartoon Characters Who Should've Been Couples -    • Top 10 Cartoon Characters Who Should'...  

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