spendthrift spendthrift /ˈspɛndˌθrɪft/

adjective

1. Recklessly wasteful  ( prodigal , profligate , spendthrift , extravagant )
   recklessly wasteful
    Prodigal in their expenditures
   prodigal in their expenditures
   

noun

1. Someone who spends money prodigally  ( scattergood [Archaic] , spend-all , spender , spendthrift )
   someone who spends money prodigally