throw a sickie Share definition Flag To take a day off from work, sick leave, by pretending to be ill. See also 'chuck a sickie'. Emma was hungover on Tuesday and she just felt like going shopping, so she decided to throw a sickie. throw a sickie by bleurgh January 4, 2008 0 0 Get merch Get the throw a sickie mug. Buy Now — $32.95 See more merch