Definition of "spunger"

Bell[inda]. Pray where got you your Learning then? / Heartfr[ee]. From other Peoples Expence. / Bell[inda]. That’s being a Spunger, Sir, which is ſcarce honeſt; if you’d buy ſome Experience with your own Mony, as ’twould be fairlyer got, ſo ’twould ſtick longer by you.

1697, [John Vanbrugh], The Provok’d Wife: A Comedy, as It Is Acted at the New Theatre, in Little Lincolns-Inn-Fields, London: […] J[ames] O[rme] for R[ichard] Wellington, […], and Sam[uel] Briscoe […], act III, page 30