Frank Nelson (6 May 1911 – 12 September 1986) was an American comedic actor. He is best known for playing put-upon foils on radio and television, and especially for his "EEE-Yeeeeeeeeesssss?" catchphrase.
He made numerous guest appearances in television shows, including The Jack Benny Program, I Love Lucy, The Real McCoys, The Addams Family, Alice, and Sanford and Son. He also provided voices for animated series such as The Flintstones, Mister Magoo, The Jetsons, Dinky Dog, and The Snorks.