Starbucks Crack Baby
People, usually very young, who MUST have Starbucks (or similar sugary, caffeine-loaded McStuff) at least every day. Typically very brand-aware. Similar beverages from the 'wrong' brand just won't do.
Hold on, we gotta stop here. She's a Starbucks crack baby, and she'll kill us all if she doesn't get her fix this morning.