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]
(..) - A fraudulent used car salesman. Booth, meet Mr. Starret. I ran the standard eight nuclear markers for canids... What is that, like some kind of a bug? - Not a bug, Agent Booth. - Canis lupus familiaris. See how annoying that interrupting know it all used-car salesman thing can be? (..)2008 TvShow: Bones Title: The Finger in the Nest Season: 4 Episode 3