Definitions from Wiktionary (thrash)

▸ verb:  To beat mercilessly.
▸ verb:  To defeat utterly.
▸ verb:  To thresh.
▸ verb:  To move about wildly or violently; to flail; to labour.
▸ verb:  (software) To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result.
▸ verb:  (computing) In computer architecture, to cause or undergo poor performance of a virtual memory (or paging) system.
▸ noun:  (countable) A beat or blow; the sound of beating.
▸ noun:  A surname.
▸ noun:  (music, uncountable) Ellipsis of thrash metal. [A heavy and intense form of heavy metal music with a focus on speed, technical precision, alternate picking, and extended guitar solos, and often having aggressive lyrics.]
▸ Also see thrash

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