[Cicero]

It can be a bit dirty, but I like this definition of plonker that I just googled:

“blathering like the plonker that you are”; - nincompoop, poop, ninny, nong

[Cicero]

And speaking of nong, this is a photo of a nonggang babbler:

Learn something new every day.

[Humble Servant]

” “blathering like the plonker that you are”; - nincompoop, poop, ninny, nong “...

Sounds like a good start on an Obama song lyric to me!