When one of your friends says a phrase in a particularly whiny and fast-paced way that it sounds like all the words are joined into one and overall resembles complete and utter jibberish unless you knew what that person normally says in a given time.
Often used when replying with the phrase "not very bad" to someone, but the phrase can be anything.
Person 1: "Nice! We finally won a game guys"
Person 2 using the Whiny W... Voice: Not very bad (sounds like "nnnnoverba")