What is a Wibble?

[Boudicca]

It's from Blackadder...

http://www.youtube.com/watch?v=fQr24qVt7f4&feature=player_detailpage#t=199s

Wibble (a whatever word . use when ever you can't be bother or do now the right word to say)

Also can substituted for a swear word of a similar Wan* or Bugg*

Similar words include :-

Watsit
Ujamaflip
Thingamibob

type of words too tired to think of any more