bumdiggy is a word used usually when someone tells you something that is quite good and very suprising, occasionally if something is really great it will be repeated a couple of times but on the last of these repetitions the diggy wont be said.
will: "i found 20 quid on the floor, coming to get a pizza?"
stuart: "yeh?? orr bumdiggybumdiggybumdiggybum!!!!"
stuart: "yeh?? orr bumdiggybumdiggybumdiggybum!!!!"
by William O'Grady October 30, 2005