<Table> <Tr> <Td> </Td> <Td> Look up let the cat out of the bag in Wiktionary, the free dictionary . </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Look up let the cat out of the bag in Wiktionary, the free dictionary . </Td> </Tr>

What is the origin of the idiom let the cat out of the bag