thrash

Give a thrashing to; beat hard.

Beat the seeds out of a grain.

Dance the slam dance.

Move or stir about violently.

“The feverish patient thrashed around in his bed”

Beat thoroughly and conclusively in a competition or fight.

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!”

A swimming kick used while treading water.