greatest thing since sliced bread

Idioms  

1. Also, best thing since sliced bread. An excellent new invention, as in Harry swears that this new program is the greatest thing since sliced bread. This phrase, used either straightforwardly or sarcastically, alludes to the convenience of buying bread that is already sliced. [Mid-1900s]

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Example Sentences

Sure, AI is the greatest thing since sliced bread, but we probably don’t need 100 gigawatts of toasters paid for with datacenter-collateralized debt guarantees from toaster manufacturers—today’s circular deals.

From The Wall Street Journal

Brown says: "I thought: 'All right, everyone tells me he is the greatest thing since sliced bread, maybe I can help.'"

From BBC

It’s always fun to play a character that thinks the world worships them and they think that they’re just the greatest thing since sliced bread, and then watching that person slowly unravel and fall on their face and be humiliated and kind of brought down to earth.

From Los Angeles Times

He was 18 and overhyped, evidenced by a nickname that likened him to the “greatest thing since … sliced bread.”

From Seattle Times

Your character Mo has to believe that Zeke is the greatest thing since sliced bread, even though any grownup looking at him would see that guy's the biggest mess on the world.

From Salon