noun. A braggart, bully.

…that rogue, that foist, that fencing Burgullian?
Every Man In His Humor, Ben Jonson (1598)

This word has a great sound to it. If you call someone a burgullion, they might not know what it means but it’s not to hard to tell that this isn’t a very nice thing to call someone… so use it!

This word is “Conjectured to be a term of contempt, invented upon the overthrow of the Bastard of Burgundy in a contest with Anthony Woodville, in Smithfield 1467,” but OED says that this story is most likely not the true origin of this word.

Maybe it’s “burglar” + “gullion” which would be “a mean person who steals things.” Maybe not.