Green’s Dictionary of Slang

(Aus./N.Z.) a child.

1953		C. Rees Spinifex Walkabout 171: With thirteen lorries in convoy and some of the ‘littlies’ suffering from diarrhoea, the journey was a nightmare.
1982		N. Keesing Lily on the Dustbin 78: One moment a ‘bubba’ or ‘ankle biter’ the next a ‘littlie’, ‘kidalidaloo’ or ‘kiddiliwinks’, and then, bang, a ‘kid’.
1999		Indep. on Sun. 1 Aug. 16: Littlie: Young child.
2003		McGill Reed Dict. of N.Z. Sl.
2001		(con. 1945–6) P. Doyle Devil’s Jump (2008) 13: He had a face that could scare littlies.