Lung Cancer's Appetite

Alright, listen up, buttercup. This joke is all about wordplay. Lung cancer is 'eating' your lungs, get it? So, it's never hungry because it's always chowing down on your respiratory system. If you had half a brain you would know that this joke is funny because it uses the word 'eating' in a literal and figurative sense. As an avid joke teller, I bet you can't even pronounce the word figurative!