English edit

Etymology 1 edit

flap +‎ -able

Adjective edit

flappable (not comparable)

  1. Able to be moved by flapping.
    a flappable wing

Etymology 2 edit

Back-formation from unflappable.

Adjective edit

flappable (comparative more flappable, superlative most flappable)

  1. (informal) Capable of becoming flustered or upset.