What does the term "hot dog lawyer" mean?

What does the term "hot dog lawyer" mean? I've heard this term quite a few times, and I am not sure what does the term "hot dog" as an adjective describe?

For example:

“And they usually don't have a hot-dog lawyer waiting for them when they arrive at the station.”

From the book: 'Death by Sudoku' by Kaye Morgan

Sally Yates is a hotdog lawyer who never should have been the acting attorney general.

Joe diGenova, on Fox News (with transcript of video).

He was a hot-dog lawyer from Dallas with one of those seven-figure houses on Truman Annex.

From the novel 'Air Dance Iguana' by Tom Corcoran

hot-dog lawyer

(or 'hot dog' or 'hotdog', there's no difference here) is not a lawyer that eats hotdogs or represents hotdogs in court or is made of hotdog.

This is a very figurative use of the word 'hotdog'. Here it means someone who shows off or is self-aggrandizing in an ostentatious manner.

Of course, the first meaning of 'hot dog' as a synonym for frankfurter-style sausage (from ~1890), is not particularly literal already. Its origin is obscure, but probably a glib humorously intended coinage, possibly implying the source of the meat. In contemporary American usage, that connection is barely noticed. Puns involving it are rarely so literal and usually involve a dog on the beach rather than in a slaughterhouse.

In the end, there is nothing special about 'lawyer' here. You can have a hot dog fighter pilot, a hot dog wind surfer, a hot dog salesperson, anyone who could be said to be showing off their skills and maybe a little out of control.

It's essentially an American usage, so perhaps as a Brit I shouldn't comment. But I found just 10 instances of hot dog lawyer (and 4 instances of hotdog lawyer) in Google Books.

Set against a claimed 6,590 instances of hotshot lawyer (and 3040 of hot shot lawyer, which will also include those for hyphenated hot-shot), I think the only reasonable conclusion is that a few people have misheard / incorrectly recalled the idiomatic standard usage here.

hotshot, adjective (dictionary.com)
1: highly successful and aggressive:
a hotshot lawyer; a hotshot account exec.

2: displaying skill flamboyantly:
a hotshot ballplayer.

Hot dog! is a colloquial AmE exclamation usually meaning something like Wow!, Great!, That's amazing! It has no significant currency as an adjective meaning high quality, very good.

I should point out that hot[-]dog does have more extended use (derived from the original approving exclamation as mentioned above). From Merriam-Webster...

Surfers adopted it from the use of the noun hot dog for someone who is very good at something... In time, the noun became mainly associated with people who showed off their skills in sports, from basketball to skiing, and the verb form came to be used for the spectacular acts of these show-offs.

But I think flamboyant lawyers only win in Hollywood movies. In real life I'd rather have a highly successful and aggressive lawyer batting for me - if I had the money, bearing in mind it's almost proverbial that most of us can't afford a hotshot lawyer.

The term hotdogger is often used to describe anyone who is conceited, cocksure or arrogant.