1. Friendly remark said before starting to drink an alcoholic beverage
   - cheers, skol, skoal, bottoms up [informal]
    
2. An informal farewell remark
   - cheers [Brit, informal], toodle-oo [informal], toodle-pip [Brit, informal], ta-ta [Brit, informal], ta-ra [UK, informal], bye [informal], goodbye, bye-bye [informal], good-bye [N. Amer], good-by [US], farewell, sayonara [US, informal], so long [informal], vale [archaic]

Encyclopedia: Chin-chin