A word native to Cumbernauld, Scotland which describes any non alchoholic drink. It takes other forms for other meanings like "Droofed" meaning to be thirsty or "Undroofed" meaning that you are deprived of a drink.
Mike: I'll give you a droof if you eat that shit"
john: *eats the shit*
Mike: "Well done, you've earned that Tizer!
I am severely droofed
That is one poor attempt, and so you will now be undroofed