pain in the ass

Noun

• something or someone that causes trouble; a source of unhappiness
  • washing dishes was a nuisance before we got a dish washer
    
  • a bit of a bother
    
  • he's not a friend, he's an infliction
    

Related words

• Synonyms: 
  annoyance , bother , botheration , pain , infliction , pain in the neck