Here's the deal, folks. If someone tells you 'you're being a real 'bee's knees', they mean you're being exceptionally cool. And we're here to help you be exceptionally cool with the best idiomatic expressions to ever bless your conversation.
It all started as an old English slang term from the early 20th century. Someone, somewhere, thought it would be a hoot to call someone 'the bee's knees' when they were being exceptionally cool. And the rest, as they say, is history.
Here are a few more 'Bee's Knees' expressions to try out:
Go ahead, try them out! You know you want to.
Using 'Bee's Knees' in Conversation - Tips and Tricks