"Yabba-Dabba-Doo!" is Fred Flintstone's most famous and iconic catchphrase and trademark featured in the original series and franchise, The Flintstones, usually to express exuberance and astonishment.
A variant on Fred's original expression is "Yabba-Dabba-Doozy!", originating with the spin-off, The Pebbles and Bamm-Bamm Show on CBS in the 1971-72 season and used by a teenage Pebbles in much the same spirit as her father's original term. Such was also heard in a later spin-off of The Flintstone Comedy Hour (known as The Flintstone Comedy Show) as aired on CBS in the 1972-74 period.
In 1960, this trademark was first used in the episode, The Flintstone Flyer after Alan Reed, the original voice of Fred Flintstone, came up with the term ad lib during an early recording session for the original series as Joseph Barbera recalls it in his 1994 memoir My Life In Toons, Reed noted that the script called for him to say simply "Yahoo!", but felt that "Yabba-Dabba-Doo!" might make it more interesting.
- Some sources contend that the term was inspired by the Abba-Zaba bar, a peanut-butter-and-Turkish-taffy sandwich such long popular in the American West.