- (idiomatic) Expresses strong support or agreement.
- 2005, Mark Alan Norris, Everything and Then Some, →ISBN, page 140:
- Boy howdy. There was indeed no rest for the wicked.
- 2010, Joe Barfield, Formula 2000, the Dream, →ISBN:
- I greeted Shannon's request enthusiastically, "Boy, howdy!"
- 2013, Honor James, The Rogue Hunter's Mate, →ISBN, page 60:
- "Talk to me, Zaidu. What do you mean?" she asked quietly. "I'm more than a little confused here. I know what's happening in my life." Boy howdy, did she!
- 2014, Steven Gould, Exo: A Jumper Novel, →ISBN:
- “Boy howdy, are you ever. You're on number four but there's no Doppler shift!"
- (idiomatic) Expresses emphasis.
- 1992, Hugh Ruppersburg, Georgia Voices: Fiction, →ISBN, page 460:
- Boy howdy, boy howdy, boy howdy! I was buried alive in noise, and the heat and cinders stung my neck and legs and the bottoms of my feet.
- 2002, Carole Marsh, Heroes & Helpers, →ISBN, page 43:
- Boy, howdy, is it cold! This is not Paris, as in "gay Paree," in France.
- 2004, Will Hancok, All 'Bout Me, an Arkansas Tail, →ISBN, page 171:
- l saw her just a standin' there with her little blue suitcase and l said, 'Boy howdy, would l like to crawl into her pants!'
- 2007, Olive Ann Burns, Cold Sassy Tree, →ISBN, page 77:
- If there wasn't a dragging brake beam to rip me down the back, I was go'n make it! Boy howdy, I did some fancy praying.
- Sometimes used sarcastically to express the opposite.