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English definition of “knacker”

knacker

verb [T] uk   /ˈnæk.ər/ us    // UK slang

knacker verb [T] (BREAK)

to break something: Careful or you'll knacker the gears!

knacker verb [T] (MAKE TIRED)

to make someone very tired: Don't go too fast or you'll knacker yourself in the first hour.
(Definition of knacker from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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