Hot

Figuratively speaking, something that is "hot" is intense.

When applied to people, particularly women, this means, for example, intensely sexy.

When applied to products, it means, intensely popular.

Example 1: "That actress is really hot. Is she single?"

Example 2: "The Prius is really hot right now. You can't just buy it from the dealer and drive it off the lot; you're put on a waiting list and might have to wait months!"