Go shopping: go to shops to buy things
Do the shopping: weekly/monthly shopping
Grocery shopping: shopping for food items
Bargain hunting: searching for bargains
Window shopping: just looking, not buying
Shop around: compare prices before buying
Spend money on sth: Use money to buy sth or pay for sth
Shop online: shop on the internet
On sale: at a reduced price
For sale: available to buy
A wallet: a money/card holder
A receipt: paper proo of a purchase
A price tag: thing that shows the price
A bargain: a good value product
A shopaholic: someone who loves shopping
A fitting room: a place to try on clothes
Try sth on: try clothes before buying them
Take sth back: return an unwanted item to the shop
Get a refund: get money back after returning an item
In cash/by card: Use cash or credit card to pay
Waste money on sth: Unnecessarily spend money on sth
Splash out on sth: spend a lot of money on something
Retail therapy: the act of shopping in order to feel better
A good deal: if something is a good deal, paid a low price
Outlet mall: Both have many stores in one location