heyo

hey +‎ -o (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “Could also be a variant of hello. Sources?”)

heyo

1. hey; hallo; a casual greeting
   • 1948, Enid Blyton, The Brer Rabbit Book:

     'Heyo!' he said to himself. 'What's all this going on? Just wait a minute, and I'll find out!'

2. hey; hello; a casual greeting.
   • 2009, Charles G. West, The Blackfoot Trail:

     “Heyo!” He heard a call from the edge of the bluffs and turned to see Jake Simmons angling across the clearing to intercept him. “Hold up a minute, Joe,” Jake called after him.

• oi, yo; see also Thesaurus:hey

• Hoey, Hoye, Yeoh, Yohe