Definition of 飛んでもない
(adj-i) unthinkable; unexpected; outrageous; offensive
It isn't true that Jack is no good at music; on the contrary, he plays the piano well.
(exp) absolutely not!; not at all!; far from it!; impossible!; preposterous!; what a thing to say!; no way!; bullshit
"Have you finished it?" "On the contrary, I've just begun."
- don't mention it; you're welcome