A Brazilian joke takes over the world!
Brazilian writer Paulo Coelho helped spread the joke, as did unwittingly many of his followers and fans.
See
Cala Boca Galvao – Paulo Coelho blog
Brazil’s ‘Cala Boca Galvao’ Drive is for the Birds – NY Times
Brazil: The “CALA BOCA GALVAO” Phenomenon
‘¿Cala boca, Galvao?’
