This sound is from Jeffy Soundboard

Jeffy is a masculine given name, a variation of Jeffrey, which may refer to a child character in the syndicated comic strip The Family Circusa character in The Devil Wears PradaJeffy "Brad" Bradley, a character in a webcomic Schlock Mercenary.
See also: The Family Circus, Jeffrey (name), List of Daria characters, Pete Davidson, Jeff Keane, GenSan Warriors.