haywire

Adjective

• not functioning properly
  • something is amiss
    
  • has gone completely haywire
    
  • something is wrong with the engine
    

• informal or slang terms for mentally irregular
  • it used to drive my husband balmy
    

Noun

• wire for tying up bales of hay

Related words

• Synonyms: 
  amiss(p) , awry(p) , wrong(p) , balmy , barmy , bats , batty , bonkers , buggy , cracked , crackers , daft , dotty , fruity , kooky , kookie , loco , loony , loopy