From Wiktionary, the free dictionary
come on down
- An invitation to someone in the upper part of a building to come downstairs.
Come on down! Breakfast is ready!
2017, “Come on Down”, in Devil Is Fine, performed by Zeal & Ardor, Track 4:I can see no devil on the field / Just many trees and papa's many seeds / I can see no devil in the field / Come on down, come on down
- An invitation to someone living to the north to come for a visit.
- A catchphrase used on the television game show "The Price is Right", inviting a member of the audience to come to Contestant's Row to play the game.
Veronica Johnson, come on down!
