to blow one's money
francisco: have you heard about mel's big win?
jack: no, but i know he's a betting man. was it at the horse races?
francisco: that's right. he won $2,000 on the very last race.
jack: that must have been his biggest win ever.
francisco: and do you know what he did with it?
jack: if he had any sense, he would have put it in the bank.
francisco: he didn't. he blew the lot on a party for his pals at the golf club.