Green’s Dictionary of Slang

chippie n.2

also chippy, sub-chip
[SE colloq. phr. chip off the old block, or they have only just chipped in]

1. (US) a young person.

Duckett & Staple ‘Double Feature’ in N.Y. Age 6 Mar. 7/2: Ruth Mitchell has admirers in chippie and sub-chippie classes [...] Butch White [...] seems to be the most persistent.
Duckett ‘Double Feature’ in N.Y. Age 22 Jan. 7/2: Les Amigas group of charming sub-chips [...] have dug a up a new wrinkle in entertainment angles.
[UK]B. Beckham My Main Mother 126: I’m thirty-six years old you know. I’m no young chippy.

2. (US) a beginner, an innocent.

[US]P. Di Donato Christ in Concrete 92: Such a sad little chippie is he.
[US]J. Scarne Complete Guide to Gambling.
[US]‘Red’ Rudensky Gonif 50: They had so many damn clay-assed, two-bit chippies in Atlanta, the screws actually seemed to welcome a con with a reputation.