So where does dude come from? Evidence points to "doodle," as in "Yankee Doodle Dandy." He's the fellow who, as the song has it, "stuck a feather in his cap and called it macaroni." "Macaroni" became a term for a dandy in the 18th century after young British men returned from their adventures on the European continent sporting exaggerated high-fashion clothes and mannerisms (along with a taste for an exotic Italian dish called "macaroni"). The best a rough, uncultured colonist could do if he wanted to imitate them was stick a feather in his cap.