Bladdum
A type of vomit consisting of mostly water. Generally occurs after an individual vomits from drinking heavily, drinks water, then vomits again.
Steve drank a glass of water and puked again, now there's bladdum all over my new carpet.
Bladduming
Rolling your tounge out of your mouth in a certain way to where it makes a "bladdum" noise.
Usually a small child will begin bladduming of boredom during the commercial breaks of T.V.