Displaying acronyms

I'm working on a website for a student society. The society has been established for a good number of years now, and in its humble beginnings it was known by an acronym. For the purpose of this example, let's call it Just Another Gaming Society, or JAGS for short. However, both on the official logo and most branding, we still go by JAGS, and we've got the obvious problem of newcomers wondering what the blazes JAGS actually stands for.

How could we represent both on the site? I'm approaching building it with both society members and total newcomers in mind, so it'd be good if there was a way to show both our full name and our acronym without causing some issues. It's a long name, and having it in a navbar probably isn't very attractive. I'd be tempted to display the full name briefly and then compact it down - what might be the best way to trigger this?