Junkie/ˈdʒʌŋki/ Definition 1 of 2Pro Tip 1/3Informal Usage Used casually among friends, not in professional or formal settings. I'm a true coffee junkie; can't start my day without it! Pro Tip 2/3Positive Tone Shows admiration towards someone's dedication to an activity. She's a real book junkie; she reads one every week! Pro Tip 3/3Hyperbolic Expression Often an exaggeration, not to be taken literally. My brother's a gadget junkie; always has the latest tech!