thrash - noun

a swimming kick used while treading water

thrash - verb

• give a thrashing to; beat hard
• move or stir about violently
• 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
• beat the seeds out of a grain
• beat thoroughly and conclusively in a competition or fight

thrash - thesaurus

bat   clobber   convulse   cream   drub   flail   jactitate   lam   lick   mosh   slam   slash   thresh   toss