What does the Cliche know it like back of my hand mean?

The phrase "know it like the back of my hand" is a cliché, not "Cliche." It means that someone knows something extremely well, as if they could navigate it blindfolded.

Here's a breakdown:

* "Know it": Indicates understanding and familiarity.

* "Like the back of my hand": A vivid metaphor comparing the level of knowledge to the intimate understanding someone has of their own hand.

Examples:

* "I know this city like the back of my hand. I can get you anywhere you need to go."

* "She knows her job inside and out; she knows it like the back of her hand."

Essentially, it conveys a sense of complete mastery and confident familiarity with something.