"It has been brought to my attention that the correct term for people who don't believe in the space station is fucknozzle - not shitwit" - Professor Brian Cox
An individual that will cut you off in traffic, or will purposely not let you merge onto the freeway in front of them. Usually seen driving a Chevy Camaro or 1985 Firebird.
"Dude...did you see that fucknozzle purposely speed up so that I couldn't merge over? What an asshole."