"electronic noise," 1953, imitative.
1957, from bleep (n.); specific sense of "edit a sound over a word deemed unfit for broadcast" is from 1968 (earliest reference seems to be to the "Smothers Brothers Comedy Hour" on U.S. television). Related: Bleeped; bleeping.
A generalized euphemism substituted for a taboo or vulgar term; blankety-blank: your bleeping black ass/ They're a bunch of arrogant bleeps who think their stuff doesn't stink/ The movie ain't no blipping good
[1970s+; fr the practice of erasing objectionable material on a tape or in a soundtrack with a high-pitched sound called echoically a bleep]