- exhausted; very tired: He is really knackered after work.
Origin of knackered
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- exhausted; tired out
- worn out; no longer working, esp after long or hard use
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for knackered
"worn out, tired," past participle adjective from knacker (v.).
Online Etymology Dictionary, © 2010 Douglas Harper