Pirate Garb and Sailors Slops

Hood is a kind of cap or hood of a conical shape and back to the period of the Inquisition, in which the condemned were forced to wear ridiculous costumes to attend the trials.
Além de usar uma túnica com o formato de um poncho , eles precisavam colocar sobre a cabeça um chapéu longo e ponteagudo, conhecido como carapuça.
Besides using a tunic shaped like a poncho, they had to put on his head a hat long and sharp, known as hood.
Daí a expressão "vestir a carapuça" ter se incorporado ao português escrito e falado com o sentido de "assumir a culpa".
Hence the expression "wearing a hood" have been incorporated into Portuguese written and spoken with the sense of "take the blame."

A palavra vem do italiano antigo, carapazza , e do espanhol caperuza .
The word comes from the Italian old carapazza, and the Spanish caperuza.