thrash

a swimming kick used while treading water

give a thrashing to; beat hard

move or stir about violently; "The feverish patient thrashed around in his bed"

dance the slam dance

beat so fast that (the heart's) output starts dropping until (it) does not manage to pump out blood at all

move data into and out of core rather than performing useful computation; "The system is thrashing again!"

beat the seeds out of a grain

beat thoroughly and conclusively in a competition or fight; "We licked the other team on Sunday!"