I. ˈflipˌflap adverb
Etymology: flip (I) + flap (v.)
: with repeated strokes and noise
something going flip-flap in the dark
II. noun
or flip-flop -ˌfläp
1. : the repeated sound and motion of something loose that is moved by recurrent impulses
the flip-flap of the awning in the gusty wind
2. : a backward somersault
3. flip-flap : a device used especially in amusement parks that consists of a horizontal rotating arm pivoted at its center and supporting a passenger car at each end
4. flip-flop : flip-flop circuit
III. intransitive verb
: to move flip-flap