thrash

Short definition from Wiktionary

Verb

1. 1
   To beat mercilessly.
2. 2
   To defeat utterly.
3. 3
   To thresh.
4. 4
   To move about wildly or violently; to flail; to labour.
5. 5
   To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result.
6. 6
   In computer architecture, to cause or undergo poor performance of a virtual memory (or paging) system.

Noun

1. 1
   A beat or blow; the sound of beating.
2. 2
   Ellipsis of thrash metal.

Proper noun

1. 1
   A surname.