adjective, thrift·i·er, thrift·i·est.
Examples from the Web for unthrifty
I had always thought—shade of Napoleon, forgive me—that the peasant French were an unthrifty, unneat people.Caper-Sauce|Fanny Fern
As they come up he weeds out all unthrifty plants, only allowing the strongest to come to maturity.The Meaning of Evolution|Samuel Christian Schmucker
She was often heard to remark that Mr. Whitman was the most "unthrifty" man she had ever met.Walt Whitman in Mickle Street|Elizabeth Leavitt Keller
Unthrifty, un-thrif′ti, adj. not thrifty: without thriftiness.
On the other hand, their responsibility was strictly personal, and unthrifty wardens were removed from office.Medival London|William Benham