knackeredknack‧ered /ˈnækəd $ -ərd/ adjective British English spoken informal 
Examples
a knackered old bike
ExamplesEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- I've been up since four o'clock this morning - I'm absolutely knackered!
- When you're training a team sometimes it's good to push them until they're knackered.
THESAURUS► tired
1extremely tired SYN exhausted2too old or broken to use SYN clapped-out British English: feeling that you want to sleep or rest: · I was really tired the next day.· the tired faces of the children
► exhausted extremely tired: · I was exhausted after the long trip home.· He sat down, exhausted.· She immediately fell into an exhausted sleep.
► worn out [not before noun] very tired because you have been working hard: · With three small children to care for, she was always worn out.
► weary written tired because you have been travelling, worrying, or doing something for a long time: · weary travellers· a weary sigh· He looks tired and weary after 20 years in office.
► fatigued formal very tired: · They were too fatigued to continue with the climb.· Because of her illness, she often became fatigued.
► drained [not before noun] very tired and feeling as if all your energy has gone: · Afterwards, he felt drained, both physically and mentally.
► bushed/beat [not before noun] informal very tired: · I’m bushed. I think I’ll go to bed early.· I’m beat. I don’t think I’ll go for a run tonight.
► knackered British English, pooped American English [not before noun] informal very tired. Knackered is a very informal use – do not use it in polite conversation: · By the time I got home I was absolutely knackered.
► shattered [not before noun] British English informal extremely tired: · When I first started teaching, I came home shattered every night.
► dead spoken extremely tired, so that you cannot do anything but sleep: · I was absolutely dead by the time I got home.
Longman Language Activatortired after exercise or work► tired · I usually feel too tired to cook dinner after a day at the office.· We sat down and stretched out our tired legs.· They came back from their long walk, tired but relaxed.· Overly tired drivers can be nearly as dangerous as drunk drivers.get tired (=start to feel tired) · Can we stop soon? I'm getting really tired.
► exhausted very tired, especially because you have been doing a sport or other hard physical activity, and you have used all your energy: · I was exhausted every day when I first started teaching, but I'm used to it now.· The exhausted dancers collapsed as they stepped off the stage.exhausted from/by: · The five of them were still exhausted from their 36-hour train ride.completely/absolutely exhausted: · We had been walking for over 20 miles, and we were completely exhausted.
► tired out/worn out very tired, especially after a lot of hard work, physical exercise, or travelling: · Come in and sit down. You look worn out.· The men had been working in the fields all day and they were tired out.tired out/worn out from/by: · Susan and Lloyd were both tired out from feeding, bathing, and putting the children to bed.
► shattered British very tired, especially as a result of mental effort or worry: · When he came out of the exam he felt shattered.· I've had a terrible day at the office and I'm absolutely shattered.
► weary written so tired after a very long period of working, travelling, or great mental effort that you feel you can hardly continue with what you are doing: · After the hike the two were so weary they fell asleep immediately.· Snow in Boston closed down the airport, causing even more delays for weary travellers.grow weary: · My head grew weary from trying to follow his arguments.
► drained very tired and feeling as if all your energy has gone, especially as a result of an unpleasant emotional experience, such as being worried, upset, or shocked: · By the end of the day I felt drained, with nothing to show for all my work.· After losing the game, Coach Saylor came to the press conference looking and sounding emotionally drained.
► knackered British very tired: · I've been up since four o'clock this morning - I'm absolutely knackered!· When you're training a team sometimes it's good to push them until they're knackered.
► beat/pooped/bushed American informal very tired: · Wow, I'm pooped. I don't feel like going to the gym tonight.· You look beat - what have you been doing?· Will you excuse me? I'm bushed - I think I'll go to bed.
► be dead on your feet/be ready to drop informal to be so tired that you are almost unable to stay standing: · After fourteen hours of non-stop work I was dead on my feet.· For goodness' sake go home! You look ready to drop.
a knackered old bike