I'm not at all sure when I heard the word presto used first, but I imagine is was on some early day TV magician show where the guy taps his top hat with his magic wand, says "Presto!", and out pops a cute white rabbit. Now the definition of the word presto is...
presto-[pres-toh] adverb, adjective, noun
1. quickly, rapidly, or immediately.
2. at a rapid tempo (used as a musical direction).
3. quick or rapid.
4. executed at a rapid tempo (used as a musical direction).
5. Music. a movement or piece in quick tempo.
Now what brought me to thinking about the word presto was an occurrence the other day in our mud room. With the nice warm days we've had, for some reason our unfinished mud room collects fly's, and on this particular day, one of those little pests was on one of the windows so I took a swat at it with my cap and Presto!... my window turned into garbage. I guess the little metal button on the top of the cap hit the glass just right.
It's amazing how fast something can go from useful to useless... kinda prestoish.