v. t.1.To beat out grain from, as straw or husks; to beat the straw or husk of (grain) with a flail; to beat off, as the kernels of grain; as, to thrash wheat, rye, or oats; to thrash over the old straw.
[imp. & p. p. Thrashed ; p. pr. & vb. n. Thrashing.]
2.To beat soundly, as with a stick or whip; to drub.
1.To practice thrashing grain or the like; to perform the business of beating grain from straw; as, a man who thrashes well.
2.Hence, to labor; to toil; also, to move violently.
I rather would be Mævius, thrash for rhymes,
Like his, the scorn and scandal of the times.
- Dryden.
Noun1.thrash - a swimming kick used while treading water
Verb1.thrash - give a thrashing to; beat hard
Synonyms: flail, lam, thresh
2.thrash - move or stir about violently; "The feverish patient thrashed around in his bed"
3.thrash - dance the slam dance
Synonyms: mosh, slam dance, slam
4.thrash - beat so fast that (the heart's) output starts dropping until (it) does not manage to pump out blood at all
5.thrash - move data into and out of core rather than performing useful computation; "The system is thrashing again!"
6.thrash - beat the seeds out of a grain
Synonyms: thresh
7.thrash - beat thoroughly in a competition or fight; "We licked the other team on Sunday!"
Synonyms: drub, lick, clobber, bat
thrash - To move wildly or violently, without accomplishing anything useful. Paging or swapping systems that are overloaded waste most of their time moving data into and out of core (rather than performing useful computation) and are therefore said to thrash. Thrashing can also occur in a cache due to cache conflict or in a multiprocessor (see ping-pong).

Someone who keeps changing his mind (especially about what to work on next) is said to be thrashing. A person frantically trying to execute too many tasks at once (and not spending enough time on any single task) may also be described as thrashing.

Compare multitask.
bang, baste, bastinado, batter, beat all hollow, beat hollow, belabor, belt, best, birch, bolt, buffet, cane, clobber, club, cordon, cordon off, cowhide, cudgel, cull out, cut, destroy, divide, do in, drub, fix, flagellate, flail, flap, fustigate, ghettoize, gin, give a whipping, give the stick, hammer, hide, hors de combat, horsewhip, insulate, isolate, keep apart, keep aside, knock, knout, lace, lambaste, larrup, lash, lather, lay aside, lay on, lick, maul, outclass, outdo, outfight, outgeneral, outmaneuver, outpoint, outrun, outsail, outshine, pail, paste, patter, pelt, pick out, pistol-whip, pommel, pound, pulverize, pummel, put, put aside, quarantine, rap, rawhide, riddle, ruin, scourge, screen, seclude, segregate, separate, set apart, set aside, settle, shellac, sieve, sift, skin, skin alive, sledgehammer, smear, smite, smother, sort out, spank, strike, stripe, swinge, switch, thresh, thump, trim, triumph over, trounce, truncheon, undo, wallop, wear out, whale, whop, winnow, worst
Translate Thrash to Spanish, Translate Thrash to German, Translate Thrash to French
Thousand-headed cabbage
-- Thrash --
thrash about
thrash out
Thrasher shark
Thrasher whale
Thrashing floor
Thrashing machine
Thread and thrum
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