Down the drain...

Do you know what a drain is? In Japanese, it is 流し. When someone says:

Something is down the drain

They mean that it is wasted. For example; you bought something and it broke, so your money went down the drain.

I can't believe it broke! I bought this lamp yesterday... that's 50 bucks down the drain...

Man, I spent the whole night with her and didn't even get a goodnight kiss! What a waste, my whole Friday night has gone down the drain...

As you can see, you can replace is with to go.

If you don't eat that pie soon it'll go bad. That'll be 3 bucks down the drain.

Bucks = dollars in casual North American English. 

Have a nice weekend,

Phil