"Beep Beep" or meep meep is onomatopoeia representing a noise, generally of a pair of identical tones following one after the other, often generated by a machine or device such as a car horn. It is commonly associated with the Road Runner in the Looney Tunes cartoons featuring the speedy-yet-flightless bird and his constant pursuer, Wile E. Coyote. "Beep, Beep" is the name of a 1952 Warner Brothers cartoon in the Merrie Melodies series.
Chuck Jones, the creator of the Road Runner, has stated that this sound, the only way the Road Runner can harm the Coyote, was inspired by hearing a Doppler-like effect as background artist Paul Julian carrying set backgrounds beep-beeped when he could not see where he was going. Although commonly quoted as "meep meep", Warner Brothers, the current owner of all trademarks relating to the duo, lists "beep, beep" as the Road Runner's sound, along with "meep, meep."
"Beep, Beep" ("The Little Nash Rambler") was a song which utilized the "beep, beep" sound in a tempo-changing novelty record recorded by The Playmates in 1958. The record became a #4 hit on the Billboard Top 40 chart for twelve weeks. The lyrics tell the story of how the beep-beep horn of the "Little Nash Rambler" following close behind the driver of a Cadillac infuriates him into going ever faster -- but the Rambler driver keeps pace with the Cadillac, in order to yell out of his window to the Cadillac driver in the final line of the song, "Hey, buddy, how can I get this car out of second gear?" [1]
The Beatles' song "Drive My Car", from the 1965 album Rubber Soul, contains the line "Beep-beep, beep-beep, yeah!" as the song enters an instrumental break, and the line appears again at the end of the song, being repeated as it fades out. The first instance of the line is sometimes used by oldies radio stations to introduce a traffic report.
In 1978, Warner Brothers recycled the Road Runner's "beep, beep" sound for its TV series, Wonder Woman, which featured a tiny robot-on-wheels named Rover who makes the "beep, beep" sound on occasion.
So popular was the image of road-burning speed inspired by the Road-Runner, that Plymouth (a division of Chrysler Car Company) named one of their V8-powered "Muscle Car" models after the Road-Runner, and the car was fitted with decals of the road-runner and a warning-horn that made the well-known "beep, beep" sound when activated.
The Road Runner cartoon also later became associated with Time Warner's Road Runner cable internet service.
In comic books, the Road Runner's actual name was "Beep Beep".
On an episode of The Simpsons, Homer Simpson meets the woman who originally recorded the sound for the Road Runner ("they paid me for one beep, then they doubled it up on the soundtrack").