interjection
howdy
HOW-dee/ˈhaʊdi/
A friendly, informal greeting.
I wave to my neighbor and call out, “Howdy!”

Etymology
“How do ye?” originally asked after someone’s health. Contracted into howdy, that inquiry became a familiar greeting rather than a request for an account of someone’s well-being.
In context
Howdy Moz fans and welcome to another edition of Whiteboard Friday.
Howdy, Thank you. Thank you. Thank you.
More examples
- “Howdy, folks, come on in!”
- She greets everyone with a smile and a cheerful “howdy.”
- “Well, howdy, stranger, it’s been a while!”