WordWeb Online

1. Very tired
   - drained [Brit], shagged out [Brit], stonkered [Brit, Austral, NZ], zonked out [Brit], zonked [Brit], shattered [Brit], shagged [Brit]
    
2. Out of working order ('busted' is an informal substitute for 'broken')
   - broken, busted, buggered [Brit], on the fritz [N. Amer], on the blink, rooted [Austral, NZ], kaput, out of order

See also: damaged, tired

Encyclopedia: Knackered