Green’s Dictionary of Slang

spurge n.

[SE spurge, one or other of several species of the genus Euphorbia, some of which are considered near weeds; thus a pun on weedy adj. (2)]

(Aus.) an effeminate young man.

[Aus]Baker Popular Dict. Aus. Sl.
[Aus]N. Pulliam I Travelled a Lonely Land (1957) 239/2: spurge – sissyfied, dandyfied man.