As a Noun: 1. An informal and friendly conversation with someone in sign language; a chat in sign language. 2. A long and enjoyable conversation with someone in sign language. 3. A long and enjoyable conversation with someone. English = chat. Informal English = chinwag. 4. The sign language of the Australian deaf community. English = Auslan. As a Verb or Adjective: 1. To talk in an informal and friendly way to someone in sign language; to chat to someone in sign language. English = sign. 2. To have a long and enjoyable conversation with someone in sign language. 3. To have a long and enjoyable conversation with someone. English = chat. Informal English = chinwag. 4. To communicate using Auslan.