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Adjective: grotty (grottier,grottiest)  gró-tee
Usage: Brit
  1. Very unpleasant or offensive
    "a grotty little play"
  2. Showing signs of wear and tear
    "a grotty old overcoat";
    - moth-eaten, ratty, shabby, tatty

Derived forms: grottier, grottiest

See also: awful, nasty, worn