It’s a figure of speech my man.
I see, still important to call this sort of stuff out.
As for it being impossible to learn in 3 months - at least as far as getting the notes down, it's not gonna be a musically masterful performance in that time - can you explain why you think it's so impossible?
I'm looking at an edition which is around 36 pages for the piano part. Assuming you had to dedicate a full working day to learning each page (8 hours), it would take about one month to study all pages. Of course, some pages might need more than that. But there are many pages that can be sight read or played in a basic version in an hour or two, given the player has a sufficiently refined technique, reading skills and approach to studying. That gives more hours to the hard pages. Let's add to that that you don't even have to play the difficult bits in full tempo the first month, you have two more whole months to work on the material.
Doesn't sound terribly unreasonable to me, assuming a skilled enough player. I have met some people in the piano world who can learn things frighteningly fast.