An All-American male with so much confidence he never gives your corpse a
second thought as he flys on past. Nowadays used either in the physical or emotional sense.
Now more often associated with sports car driving habits - but originally it meant top gun type, fighter pilots. Originally it was a reference to how fighter jet
afterburners looked like flaming (circular) assholes when they flew past targets and the type of
personality that flew those planes. Moving too fast and having too much fun to care about the victims left behind.