Wiktionary
presto change-o
alt. (context informal English) Indicates the suddenness of a change or transformation, as a magic trick in which one object appears to be suddenly transformed into another. interj. (context informal English) Indicates the suddenness of a change or transformation, as a magic trick in which one object appears to be suddenly transformed into another.
Usage examples of "presto change-o".
The mark of a good defense attorney is his ability to take any given set of facts and recast them in such a light that, presto change-o, as if by magic, what appeared to be absolute is turned into a frame-up or some elaborate conspiracy on the part of the police or government.