greasy

greasy
greas‧y /ˈɡriːsi, -zi/ adjective
1. covered in grease or oil
   SYN  oily:
    a shampoo for greasy hair
    The food was heavy and greasy.
2. slippery:
    Police say the rain’s making the roads greasy.
3. too polite and friendly in a way that seems insincere or unpleasant
   SYN  smarmy
4. the greasy pole used to refer to the difficult process of moving up in rank to a more important position:
    a politician climbing up the greasy pole
—greasily adverb
—greasiness noun [uncountable]
     

THESAURUS

   ▪ dirty not clean: His clothes were untidy and he had dirty hands.
   ▪ filthy very dirty: Each year filthy water causes millions of cases of illness.
   ▪ muddy covered with mud: It had been raining hard and the path was muddy.
   ▪ dusty covered with dust: the dusty shelves in the attic
   ▪ greasy covered with oil or grease: Greasy food is bad for your health.
   ▪ grubby (also mucky British English) informal fairly dirty and needing to be cleaned or washed: He was wearing a grubby white T-shirt. | mucky fingers
   ▪ grimy covered with thick dirt or dirt that has been there a long time: I couldn’t see much out of the grimy windows of the train.
   ▪ dingy /ˈdɪndʒi/ looking dark, dirty, and unpleasant. Used about rooms, houses, and buildings: We worked in a dingy little office behind the station.
   ▪ polluted used about land, water, or air that has been made dirty: 85% of city dwellers breathe heavily polluted air.
   ▪ contaminated made dirty by a dangerous substance or bacteria: The virus is mainly spread through contaminated food.
   ▪ squalid /ˈskwɒləd, ˈskwɒlɪd $ ˈskwɑː-/ formal extremely dirty and unpleasant. Used about the place or conditions in which someone lives: People are living in squalid conditions, with little water and no sanitation.
   ▪ unhygienic /ʌnhaɪˈdʒiːnɪk◂ $ -ˈdʒe-, -ˈdʒiː-/ formal used about dirty conditions that are likely to cause disease, especially conditions in kitchens, restaurants, and hospitals: The food was prepared under unhygienic conditions.
   ▪ unsanitary (also insanitary British English) formal used about dirty conditions that are likely to cause disease, especially because there is not a good system for getting rid of waste: People’s health is being threatened by overcrowded and insanitary homes. | They work for long hours in unsanitary conditions.
   ▪ soiled formal made dirty, especially by waste from your body: Soiled nappies should be changed as quickly as possible.