Green’s Dictionary of Slang

’lo phr.

[abbr.]

hello.

[US]D. Hammett ‘Tom, Dick, or Harry’ in Nightmare Town (2001) 244: ‘Hello, Jack!’ Phyllis greeted the prisoner. ‘’Lo, Phyl,’ he mumbled.
[US]J. Spenser Limey 19: ’Lo, Jack.
[UK]J. Phelan Letters from the Big House 82: ‘’Lo, Nobby. ’Lo, Rowley,’ Kennion greeted them.
[Aus]D. Stivens Jimmy Brockett 47: ‘’Lo, Jimmy,’ he said. ‘I was going up to you’.
[US]H. Simmons Corner Boy 44: ’Lo, Monk.
[US]C. Heath A-Team 2 (1984) 171: ’Lo, Doc.