green slip noun2 •(Australia) A certificate of third party personal liability insurance, required in order to register a motor vehicle.In New South Wales you must get an endorsed Compulsory Third Party Certificate (Green Slip) from an insurance company to be able to register your vehicle. — 2009 •(Australia, no longer used) A portion of Crown land remaining unalienated due to a size discrepancy between the land survey and the actual division.[…]we may smile at the indignation about the assistant surveyors and the green slips of South Australia. — 1839 formsgreen slips
