To beat mercilessly.
To defeat utterly.
To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result.
In computer architecture, to cause or undergo poor performance of a virtual memory (or paging) system.
To move about wildly or violently; to flail; to labour.
To thresh.
A beat or blow; the sound of beating.
thrash metal
To beat heavily on anything.
To strike an opponent heavily and repeatedly in a fight.