Green’s Dictionary of Slang

a braggart, a noisy bully.

1625		Fletcher Fair Maid III.i: She will be ravisht before our faces by rascalls and cacafugos, wife, cacafugoes!
1627		J. Taylor ‘An Armado’ in Works (1869) I 79: The Captain of her was Signior Caca Fogo [...] a sweet affable Gentleman.
1696		E. Phillips New World of Words (5th edn) n.p.: Cacafuego, a Spanish word signifying Shitefire; and it is used for a bragging, vapouring fellow .
c.1698		B.E. Dict. Canting Crew.
1725		New Canting Dict. n.p.: cacafuego a Shite-fire; also a furious fierce Fellow.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
1827		W. Clarke Every Night Book 74: Shakespearian fops and folls [...] the Cacfogos of the old comedia, the Cantons of modern dramatists.