Hi. One of them is "blowing money".

In the U.S., we say: "throwing money away" or "throwing money in the trash" "throwing money out the window" "pouring money down the drain" "flushing money down the toilet" There are probably more that I can't think of at the moment.

squandering the money

Some i have come across - burning through cash - spending money quickly - pissing his(or her) money away - drinking too much and spending all your money on it