Bee's knees and Cat's pyjamas

Bee's knees noun - Something very good of its kind.

Cat's pyjamas and bee's knees are semantically related. In some cases you can use "Cat's pyjamas" instead a noun phrase "Bee's knees".

Bee's knees and cat's pyjamas are semantically related. You can use "Bee's knees" instead a noun phrase "Cat's pyjamas".