An object or idea that's really good or enjoyable can be called tubular.
When people say something is tubular, they often mean it's cool or awesome, like a super fun wave at the beach. But sometimes "tubular" also means something is shaped like a tube, like a toilet or a drainpipe. In this case, the word is used more to describe the physical shape than how cool it is.
In everyday conversations, people might say things like, "This new video game is so tubular!" or "I just got a new pair of tubular sunglasses." It's usually clear from the context whether they're talking about something being cool or something being shaped like a tube.
Shaped like a tube.
Example: tubular bell
