nasty
adjective /ˈnɑːsti/
  /ˈnæsti/
(comparative nastier, superlative nastiest)
Idioms - very bad or unpleasant- He had a nasty accident.
- The news gave me a nasty shock.
- I got a nasty surprise when I opened the door and saw who was there.
- I had a nasty feeling that he would follow me.
- This coffee has a nasty taste.
- Don't buy that coat—it looks cheap and nasty.
 Extra Examples- a room full of cheap and nasty ornaments
- This coffee tastes nasty.
- He had a nasty moment when he thought he'd lost his passport.
 Oxford Collocations Dictionaryverbs- be
- look
- smell
- …
 - extremely
- fairly
- very
- …
 - about
- to
 - cheap and nasty
- nasty little
 
- unkind; unpleasant synonym mean- She's always making nasty remarks about people.
- the nastier side of her character
- He has a nasty temper.
- Life has a nasty habit of repeating itself.
- That was a nasty little trick.
- Some of these reality TV shows can be downright nasty. .
- nasty to somebody Don't be so nasty to your brother.
 Extra ExamplesTopics Personal qualitiesb2- Kevin seems to enjoy being nasty to his sisters.
- She was nasty about everyone.
- a nasty little man
 Oxford Collocations Dictionaryverbs- be
- look
- smell
- …
 - extremely
- fairly
- very
- …
 - about
- to
 - cheap and nasty
- nasty little
 
- dangerous or serious- a nasty bend (= dangerous for cars going fast)
- a nasty injury
- gang warfare of a thoroughly nasty kind
 Oxford Collocations Dictionaryverbs- be
- look
- smell
- …
 - extremely
- fairly
- very
- …
 - about
- to
 - cheap and nasty
- nasty little
 
- offensive; in bad taste- to have a nasty mind
- nasty jokes
 Oxford Collocations Dictionaryverbs- be
- look
- smell
- …
 - extremely
- fairly
- very
- …
 - about
- to
 - cheap and nasty
- nasty little
 
Word Originlate Middle English: of unknown origin.
Idioms 
get/turn nasty 
- to start making threats or become violent- You'd better do what he says or he'll turn nasty.
- After the game, things turned nasty and there were fights in the streets.
- Things could turn nasty if we're not careful.
 
- to become bad or unpleasant- It looks as though the weather is going to turn nasty again.
 
leave a bad/nasty taste in the mouth 
- (of events or experiences) to make you feel upset or ashamed afterwards- The whole business left a bad taste in my mouth.
 
a nasty piece of work 
- (British English, informal) a person who is unpleasant, unkind or dishonest- Don’t trust him; he’s a nasty piece of work.
- He's a thoroughly nasty piece of work.