Also a verb, informal, meaning "to bugger up" (often from over-use) or wear out. E.g. "I told Darren if he kept riding his scooter off the kerb like that, he'd knacker it. But did he listen, the little tyke?" Or "let's get take-away tonight dear, the kids have knackered me right out today."
Also a verb, informal, meaning "to bugger up" (often from over-use) or wear out. E.g. "I told Darren if he kept riding his scooter off the kerb like that, he'd knacker it. But did he listen, the little tyke?" Or "let's get take-away tonight dear, the kids have knackered me right out today."