Ritually impure; not equivalent to unhygienic or unclean.
Useful information: The following ten things are essentially najis:
Urine
Faeces
Semen
Dead body
Blood
Dog
Pig
Kafir
Alcoholic liquors
The sweat of an animal who persistently eats najasat.
NAJIS
Meaning of NAJIS in English
Advanced Islamic English dictionary. Расширенный исламский словарь английского языка. 2012