1. Looking through the window at items in a store that you do not intend to buy but enjoy looking at, or browsing in the store for a similar reason, usually to the annoyance of the owner.
2. Browsing Ebay, Amazon, or a similar website (with webpages or "windows") for interesting items that you also do not intend to buy. The internet's window shopping.
1. Let's go window shopping, maybe we can check out the new expensive jewelry store.
2. Please tell me you're not planning to buy that 10K antique dresser on Ebay.
No, just window shopping.