Perry the Platypus is the silent secret agent from Disney's Phineas and Ferb, which premiered on Disney Channel in 2007. Unable to speak, Perry communicates with a distinctive chattering growl performed by voice actor Dee Bradley Baker. Clips of the sound spread through YouTube edits, TikTok memes and Discord soundboards as shorthand for sneaky spy behavior. It endures alongside other iconic cartoon character sounds like the Woody Woodpecker laugh and Noot Noot from Pingu because fans recognize it instantly.