delinquent

Adjective

• past due; not paid at the scheduled time
  • an overdue installment
    
  • a delinquent account
    

• failing in what duty requires
  • derelict (or delinquent) in his duty
    
  • neglectful of his duties
    
  • remiss of you not to pay your bills
    

• guilty of a misdeed
  • delinquent minors
    

Noun

• a young offender

Related words

• Synonyms: 
  overdue , derelict , neglectful , remiss , juvenile delinquent