They've been trying to work/get the 'bugs' out of the system. [=trying to fix the system's problems]
He was first bitten by 'the' acting 'bug' [=he first became interested in acting] when he was 18.
Her legs were covered in 'bug' bites. [=itchy or painful wounds from insects]
(..) -That's what you do. -That's disgusting. -Watch. Look at that f$cking thing. You Iook Iike a Iizard. Like a bug coming out of your mouth. Figures you wouIdn't understand. But the women in this country, when you do that, they know. -They know what? -They understand. They go crazy. (..)1983 Scarface