"Chad"
A cartoon guy with a long nose, looking over a wall during WW2 and saying "Wot! No turnips?" (or whatever else was in short supply - like humour)...

I have no idea if this was the original "Chad", but it's the 1st one I've ever heard of..

Cheers,
Diolma

(Actually, that gives me a possible idea for a retro-style Poser image....)