someone who is somehow so stupid that they do TONS of things wrong.
You are such an idiot, for you just put calk in your mouth!
Someone who leaves their car unlocked with their wallet inside in a sketchy neighborhood
A person who manages to fail a bloodtest.
A person who sits for an exam alone and atains number two in the scoresheet.
Einstein was an idiot trying to formulate a bleach to discolour charcoal