No, this isn't a place where you buy popcorn.
Popcorn is actually the name of this shopping mall, located at Tseung Kwan O. Easily accessible from Tseung Kwan O Station. It's a little out of the way, but with MTR's coverage you can easily get there in 30-45 minutes from Causeway Bay.
It's your typical suburban mall with your usual stores like Uniqlo, Chocoolate, Catalog, etc. Their food options are quite good, but the restaurants are quite spread out...there's no true "central" food court at all.
There's two sections of this mall, called Popcorn 1 and Popcorn 2. The mall is connected to another mall called TKO Plaza, also one that's worth a walk around (Miniso is a good place to get some low-priced, decent quality, everyday goods). You can probably spend more than half the day in this complex, especially if you're an avid shopper. read more