Green’s Dictionary of Slang

(Aus.) a (teenage) girl.

1913

Sport (Adelaide) 5 July 9/3: They Say [...] That Reg T., the boy with the new overcoat, was seen trying to catch a couple of whippets in short dresses last Sunday [ibid.] The broken-hearted whippets [...] are sorry that Doody H. and James P. are not there to prevent them from being kidnapped.