That's off the chain.
[Slang] THAT'S OFF THE CHAIN. - Discover New Levels of Excitement with Off the Chain
Extremely good or exciting.
That's off the chain" draws an image from the idea of a dog breaking off its chain to imply something is wild, exciting, and overwhelmingly good, suggesting extreme freedom and enthusiasm.
Example Sentences
That concert was off the chain, seriously one of the best I've been to!
The speaker found the concert to be extremely exciting and one of the best they've attended.
Her dance moves are off the chain, she's incredibly talented.
The speaker thinks her dance moves are extremely exciting and impressive.
You should have seen the party, it was absolutely off the chain!
The speaker says that the party was extremely exciting and wild.