A burglar is another word for a thief or robber.
And, you'd imagine he specialises in stealing cats. As a cat lover, I'm glad to say that is not the case. He's called a cat burglar because he has the skills of a cat in climbing, usually up the sides of buildings to climb in through your window. Meow!!
A modern variation of cat burgling is free running. These cats don't steal but they sure know how to jump.
No English in today's video but I think you'll find it's worth watching free running, French legend David Belle. Incroyable! Mais oui!