I. ˈspen(d)ˌthrift noun
Etymology: spend (I) + thrift (savings)
1. : one that spends or uses improvidently or wastefully
mobilizing the populace against spendthrifts at the public trough — J.R.Aswell & E.J.Michelson
2. : one who spends his estate (as by drinking or gambling) so as to expose himself or his family to want or suffering or to becoming a charge upon the public
II. adjective
: given to or marked by improvident expenditure or use : wasteful
spendthrift property owners who have lived beyond their incomes — G.B.Shaw
spendthrift duplication of work — H.N.Southern