1. (Aus.) fast.
|Bulletin (Sydney) 12 Jan. 14/3: They were going very nasty, / With their heads laid to the creek, / My mouth so full of dust and oaths / I couldn’t make it speak.|
2. (US teen) extremely (whether pleasant or unpleasant), e.g. nasty cool, very cool indeed.
|Hillingdon Hall I 49: I’m not nasty particular, and never was about making money.|
|Jones Men 57: They really caught him nasty.|
3. (US) of language, obscenely.
|Semi-Tough 206: [S]he mostly liked to smoke dope and talk nasty and fuck athletes.|
|Robbers (2001) 248: Wild woman, liked to drink and talk nasty.|