| Noun | 1. | thrash - a swimming kick used while treading watertreading water - a stroke that keeps the head above water by thrashing the legs and arms | |
| Verb | 1. | thrash - give a thrashing to; beat hardbeat up, work over, beat - give a beating to; subject to a beating, either as a punishment or as an act of aggression; "Thugs beat him up when he walked down the street late at night"; "The teacher used to beat the students" | |
| 2. | thrash - move or stir about violently; "The feverish patient thrashed around in his bed"shake, agitate - move or cause to move back and forth; "The chemist shook the flask vigorously"; "My hands were shaking" whip - thrash about flexibly in the manner of a whiplash; "The tall grass whipped in the wind" | |
| 3. | thrash - dance the slam dance | |
| 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!"swap - move (a piece of a program) into memory, in computer science | |
| 6. | thrash - beat the seeds out of a grainbeat - hit repeatedly; "beat on the door"; "beat the table with his shoe" | |
| 7. | thrash - beat thoroughly in a competition or fight; "We licked the other team on Sunday!"beat, beat out, vanquish, trounce, crush, shell - come out better in a competition, race, or conflict; "Agassi beat Becker in the tennis championship"; "We beat the competition"; "Harvard defeated Yale in the last football game" | |