ABN stands for Advanced Beneficiary Notification. An ABN must be signed prior to providing a Medicare service or test to document that the patient is willing to assume responsibility for payment of services that Medicare may not cover when subject to either National or Local Coverage Determinations (NCD) or (LCD).
Chinchillas are crepuscular (most active around dawn and dusk) rodents, slightly larger and more robust than ground squirrels. They are native to the Andes mountains in South America and live in colonies called  herds  at high elevations up to 4,270 m (14,000 ft).
Chin Chin. A character on the popular YouTube channel TVFilthyFrank who wears a black body suit and has eyes drawn lazily on top of his eyelids. He often speaks in complete gibberish and Japanese, often repeating the words Chin Chin. Chin Chin also translates to penis in Japanese which is was used as a joke in the naming of Chin Chin.