Informal countable noun meaning an unpleasant person or thing; plural nasties
Definitions
An unpleasant or offensive person. The playground bully was a real nasty.
Something unpleasant, harmful, or offensive. Engineers are working to remove the nasties from our drinking water.
Used as an exclamation expressing disgust or distaste.
Definitions
Used to express disgust, disapproval, or distaste. Nasty! How can you eat that?