Be the business
Definition 1 of 1
Pro Tip 1/3Informal Usage
Used in casual conversation among friends, not in formal settings. 
I just saw the new superhero movie; it's the business!
Pro Tip 2/3British Origin
It's a British slang phrase, more common in the UK than other English-speaking countries. 
You've got to try the fish and chips at that shop – they're the business!
Pro Tip 3/3Positive Emphasis
Stresses that something is exceptionally good or impressive. 
Her performance in the play was the business, everyone loved it.