When someone takes the day of school/work, claiming "Sickness" when they are not sick.
Mostly used by Australian Students who have a test or assignment due.
Teacher: Philip?
Philip: Here
Teacher: Jack
*silence
Philip: He decided to chuck a sickie, Sir.
The type of biscuit that is purely made of the grains of our great Australians beaches. Usually turns into original form when pressure is applied. Mainly given at budget boarding schools. Digestion is not advised.