Nuu Share definition Flag British way of saying no in a rather cute way. Complimenter :"You are so cute!" Victim: Nuu >.>;; Random:"Wanna go on a date?" Girl:"Nuu >.>;;" Nuu by Mikael S February 12, 2008 0 0 Get merch Get the Nuu mug. Buy Now — $32.95 See more merch