Wiktionary
presto chango
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 chango".
Neatest trick you ever saw, presto chango, everything's a big pile of shit.
I just said those clunks are driving me crazy, and then, in almost no time at all, presto chango, when it comes to Paul's left thumb, now you see it and now you don't.