jackscunt
A person so dumb they think 'stupid' is a superpower and 'literacy' is something you eat for breakfast.
'He called me a jackscunt in front of the whole school.', from a kid who spelled 'math' as 'maths' on a test.
'He thinks 'jackscunt' is a fancy word.', from his brother who spelled 'apple' as 'appel' in a text.
'He used the word in a poem and it made no sense.', from a teacher who cried.