Someone who has an addiction-like craving of any type of juice. Be it apple or grape A Juiceaholic will always have a pitcher of juice in the Icebox.
"Hey dude, look at that juiceaholic over there in the freezer section!"
"Wow, that juiceaholic must have at least 5 types of juices in that cart"
"Yea and at least forty things of'em too!"