Sentence:  Along about 4 : 30 , just when it was getting to be about time to turn the audience over and toast them on the other side , Judy came on singing , in a short-skirted blue dress with a blue and white jacket that <WSD>flapped</WSD> in the wind . 
Meaning of the word marked with <WSD> tags:  move in a wavy pattern or with a rising and falling motion