Definition from Wiktionary, the free dictionary
Sentence-final [ edit ]
1944, Thomas Reed Powell, letter to William O. Douglas, quoted in Melvin I. Urofsky (1989), '"Dear Teacher": The Correspondence of William O. Douglas and Thomas Reed Powell' ,  Law and History Review 7(2), page 364,
No one cares about what a judge thinks,
if, as and when. All that counts is what he says.
: 1988, Harry Brown, A Walk in the Sun ,  ISBN 0803261489, page 75
The whole thing, Tyne decided, would make a nice problem to mull over in his old age -- if, as, and when.
: 1986, Roy Hoopes, “Introduction”, in 60 Years of Journalism ,  ISBN 0879723270, page 113
Geyelin declined to hire Cain as an if-as-and-when editorial writer, and it appeared as if James M. Cain, like an old soldier — would never die, but just fade away.
Usage notes [ edit ]
: 1995, Brian A. Garner, A Dictionary of Modern Legal Usage ,  ISBN 0195142365, page 414
An even worse manifestation of the phrase is if, as, and when [… ] One of the three words is suitable virtually wherever this phrase appears.
: 2002, Robert Hartwell Fiske, The Dimwit's Dictionary: 5,000 Overused Words and Phrases and Alternatives to Them ,  ISBN 0966517679, page 192
if, as, and when A wretched redundancy