Definitions
1.AdjectiveDirty, filthy. .mw-parser-output .defdate{font-size:smaller}
2.AdjectiveContemptible, unpleasant (of a person).
3.AdjectiveObjectionable, unpleasant (of a thing); repellent, offensive.
4.AdjectiveIndecent or offensive; obscene, lewd.
5.AdjectiveSpiteful, unkind.
6.AdjectiveAwkward, difficult to navigate; dangerous.
7.AdjectiveGrave or dangerous (of an accident, illness etc.).
8.AdjectiveFormidable, terrific; wicked.
9.NounSomething nasty."Processed foods are full of aspartame and other nasties.; This video game involves flying through a maze zapping various nasties."
10.NounSexual intercourse.
11.NounA video nasty.