They even have a fan account on twitter https://twitter.com/worldbollard

It's common enough here that's it's a been verbed: A car is "bollarded" if a silly driver tries to tailgate another car into a secure area, causing the bollard to rise under their car which typically destroys the sump.

Really? I had no idea that was an uncommon word. What else do you call them?

Until I learned the word bollard I just didn't have a name for them that I know of, probably called them posts if I ever referred to them directly. I knew what they were for, separating/stopping cars, just didn't know what they were called.

So I recognize the world bollard but I definitely wouldn't have been able to think of it off hand. I feel like its just not an entity that needs referring to very often.