Howdy in a sentence as a noun

Who knows, but boy-howdy if it walks like a troll...

With specific reference to you being in Iowa: howdy! I live in a rice field in Central Japan.

If you thought you had to work more after the first round of layoffs, boy howdy; after round two, you might as well park your cot in the office. Worse, in round 2 and 3 the severance packages get smaller and smaller.

I'm sure this is an instinct that is usually very beneficial, but boy howdy does it ever cause an inordinate amount of kvetching on the tubes.

Like I mentioned last time I appreciate an overview of modern Java practices but boy howdy I can't discern if this is clever trolling or a cheap way to make me read Part 3.

Their mere howdy-do was a lie, because _they_ didn't care how you did, except they were undertakers. To the ordinary inquirer you lied in return; for you made no conscientious diagnostic of your case, but answered at random, and usually missed it considerably.

Howdy definitions

noun

an expression of greeting; "every morning they exchanged polite hellos"

See also: hello hullo how-do-you-do