Going to Macy’s

A phrase used to say that you are going to make a large purchase or spend a lot of money, commonly used to say you’re doing your holiday shopping.

MOM: have you gotten your dad a Christmas present yet?

YOU: no, I still need to go to Macy’s. I haven’t gotten anyone’s present yet.

Or

YOU: this is an expensive store; I guess I’m really going to Macy’s today.