The combination of Drink and Doubt: that uneasy feeling you get just before the first sip of a drink that you've left on the table for some time.
Thought: "Did something fall in this? - Oh man, major droubt there, but I think things are okay - wait, maybe just a sip to find out..."
Agreeing with someone in a sense. It could be used taking the place of "foreal" or "right"
"Jessica was getting on my last nerve today!"
"Droubt...that bitch was mad irritating"