Green’s Dictionary of Slang

ditty n.1

1. (Aus./N.Z.) a lie; a ‘shaggy-dog story’.

[UK]Partridge DSUE (1984) 315/1: late C.19–20.

2. (US black) an anecdote, an experience.

[US]L. Durst Jives of Dr. Hepcat (1989) 6: ‘Bugs and Bops’ gang this ditty it happened to me and can happen in your city.