Green’s Dictionary of Slang

splurge n.

a rush, a sudden movement.

1840		C.F. Hoffman Greyslaer II 26: He caught my bullet in the back of his neck, gave a splurge, and was done for [DA].
1865		Leaves from Diary of Celebrated Burglar 112/1: But before a syllable could be uttered, a tremendous splurge was given by the three moochers, towards where the ‘stakes’ lay.
1912		Mansfield (OH) News 7 Dec. 10?/3: Quite a considerable bunch of language bugs took the splurge and the enthusiasm was all to the velvet.

In derivatives

splurgy (adj.)

(N.Z.) idealistic.

1953

I. Hamilton Till Human Voices Wake Us 119: There were omne or two fairly splurgy conchies in The Hill and Joe used to bring them down to earth with a bump.