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 as funny as a screen door on a battleship. Screen door on a submarine, you dork. Biff, somebody already asked me to the dance. Who? That bug George McFly? - I'm going with Calvin Klein, okay? - Calvin Klein? No, it's not okay. - You're going with me, understand? - Get your cooties off me! (..)1989 Back to the Future Part II