A cat tattoo represents a prisoner’s career or past life as a thief and it symbolizes cunning. A single cat signifies that the criminal acted alone, while several cats together show that the criminal was part of a gang. The head of a tomcat is considered to bring good luck to a thief. It can also serve as a warning not to mess with the wearer.
via russianculture, lostinasupermarket, phaseloop and google