Cantankerous

Adjective: bad-tempered, argumentative and uncooperative.
Origin: perhaps a blend of Anglo-Irish cant - 'auction' and rancorous.

And this is the cantankerous man when he is trying to smile.

Handlebar moustaches. If you do not think of these when you think of a cantankerous person then you probably don't know what the word means. I am not sure whether it is even possible to be cantankerous without a handlebar moustache. You can be any or all of the words in the definition but without the moustache you will never exceed the sum of your parts. Optional but preferable traits of the cantankerous are: clutching (or perhaps brandishing) an alcoholic beverage of some kind, brandy or ale are best; red cheeks and protruding gut, arising from excessive consumption of the aforementioned beverage along with meat such as deer or boar; a deep voice with a high-class accent, prone to speaking at a higher volume than anyone else in the room; tweed.
The word also earns extra points for containing the word 'tank' (tanks are both heavy and metal).
I'm not sure what 'auctions' have to do with anything though.