An oversized woman, in excess of 350, stimulating a man with the fludder on her body. This extra skin and fat is usually located behind knee caps and neck area. Also known as an FD-job
Mark: Hey chris i got a sweet flubberdubber from your girlfriend.
Chris: i know they are the best
flubbergubbing is somebody gay pouring half a gallon of jet fuel into another person ass hole then putting Plutonium-239 and uranium-235 deep down in there rectum after that they stich up their hole and put them into a dryer that shakes up the jet fuel and radioactive metals making a homemade nuclear bomb