Here's what one might think 'unflappable' means:
1. One who cannot be flapped
2. The opposite of flappable (without flaps)
3. Not origami friendly
But no, unflappable has to mean something seemingly unrelated to its root:
Etymology: 1un- + 1flap (state of excitement) + -able
: marked by assurance and self-control
Of course, unflappability has to do with assurance and self-control. Because everyone knows ducks, geese, and most waterfowl and other winged animals have absolutely no assurance of themselves, much less self-control. But what does that say for Cupid?