You’re a Mean One, Mr. Grinch is based on the Dr. Seuss book How the Grinch Stole Christmas and written for the 1966 cartoon special based on the book.
Theodor “Dr. Seuss” Geisel wrote the lyrics, while the music was composed by Albert Hague. The song was performed on the special by Thurl Ravenscroft.
The soundtrack for the special won a Grammy Award for Best Album for Children.
The song has become a popular Christmas fare and can often be heard on the radio.