knack·ered

[nak-erd]
adjective British Slang.
exhausted; very tired: He is really knackered after work.

Origin:
1885–90; knacker to tire (attenuation of earlier sense “to kill”; cf. knacker def. 1) + -ed2

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
knackered (ˈnækəd) [Click for IPA pronunciation guide]
 
adj
1.  exhausted; tired out
2.  worn out; no longer working, esp after long or hard use

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Knackered is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Example sentences
Getting home after work totally knackered and not falling asleep halfway through.
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