My partner managed to get her class of Year 2’s using “dunderheaded” in their writing a few years ago, dead good.
You scampi bum!
Fucking bearded wilderbeest cunts!
All those ones that harry potter fans put on signs at protests. Wank Pheasant etc
I take it the OP has said “You dunderhead” (singular) out loud and has done us on a technicality.
No. That would be awful.