In colloquial English, you can say that someone is an idiot with the construction "you absolute [noun]" or "you complete [noun]" or similar.
It doesn't actually matter what the noun is, but it works better the more obscure or specific the thing is. For example "you absolute saucepan", "you complete hose pipe", or my personal favourite "you absolute strawberry plant".
One of my favorite youtubers Octavius King demonstrates this really well by using "complete and utter desk" as a derogatory term for the worst offenders to intellect.
Sort of, there is a parallel derivation where tool can be an innuendo for penis ("used his tool"), so describing someone as a tool is a slightly less vulgar way of calling someone a dick; unrefined, rude, obnoxious.