Watch out for them whops. They like to cause trouble
Such a motion (a whop) if strong enough will usually make the girl's breasts and buttcheeks jiggle if the girl has prominent enough of these features.
The girl on the dance floor is whopping to the music.
That bellydancer must have did at least 100 whops.
They may also be spotted in the wild at your local grocery store fighting over last pack of hot Itialian sausages & a have a buggy full of pasta.
They may anwser to whop, dego, or sphagetti snapper.