vocabulary questions

[Joe]

1.For thirty years it had been a rough-and-tumble litigation firm, but as Josh approached sixty he spent less time in the courtroom and more time behind his cluttered desk.

"Clustered desk" is a desk with a lot of things lying untidily. Am I close? And, what's "rough and tumble"?

2. Of the six children gathered here now, TJ is the dumbest, though it's close.

The other five children were not smart either. They were just not as stupid as TJ. Is it the right understanding of the part in bold?

Thanks for help.

[Casiopea]

"Cluttered desk" is a desk with a lot of things lying untidily. Am I close?

That's correct.

And, what's "rough and tumble"?

When wrestlers fight they are rough with each other and they tumble.

The other five children were not smart either. They were just not as stupid as TJ. Is it the right understanding of the part in bold?

That's correct.