All this 'nickname' stuff is a bit of a red herring. Often invented by the press or those far removed from operations. E.g. "Flying porcupine" for the Sunderland.
In general R.A.F. parlance among the lineys in my time at least, the "Budgie" was the Harrier.a.k.a. "Bionic Budgie" .
To others, including myself, it was, and always will be the "bona jet".
" Jump jet " was a stupid press appellation that was hated by the operators.
What civilians may have called the 748 is a separate issue.
"Aluminum Overcast" goes back ( at least) to the B-36.