It's the mark of the unclean, to be worn by parents of toddlers.

Source: am a parent of toddlers.

If you nose you nose.

Nobody nose

I thought that was a leg and got very confused

It snot an emerald

When you're all about the drip.

... to have and to hold, ... in sickness and in health ...

This ring obviously belongs to an AFOL who is proficient with building techniques where studs are not always on top.

I leave it to the reader to determine what is the connection here.

Jatravartid ring

In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move. Many races believe that it was created by some sort of God, though the Jatravartid people of Viltvodle VI believe that the entire Universe was in fact sneezed out of the nose of a being called the Great Green Arkleseizure.

Gotta pay the troll toll...

That's sick

The meaning is different if it's pointing the other way

It means meet me in the bathroom in 14 seconds.