Fuckwit is a person who care only about themselves and this is evident in their overall attitude toward everything and everyone else in their rudeness. A person who consistently fails to obtain any degree of 'clue', and basic intelligence.
They boast superior self knowledge but really has only a limited and/or skewed grasp of any subject, and tend to mispronounce or inappropriately use language, thinking the're 'clever'. Fuckwits always believe they have 'right of way', and are above everyone else in importance and intelligence, despite their inferior IQ.
David Van 'Fuckwit' Day