dog-tired

Adjective

• drained of energy or effectiveness; extremely tired; completely exhausted
  • the day's shopping left her exhausted
    
  • he went to bed dog-tired
    
  • was fagged and sweaty
    
  • the trembling of his played out limbs
    
  • felt completely washed-out
    
  • only worn-out horses and cattle
    
  • you look worn out
    

Related words

• Synonyms: 
  exhausted , fagged , fatigued , played out , spent , washed-out , worn-out(a) , worn out(p)