Muggle

Muggles wandering right past a cache.

A muggle is a non-geocacher. It is generally accepted to be bad form to disclose the location of a geocache to a muggle because they might take or trash it.

To be a true muggle is to be unaware of geocaching. For example, if you are a geocacher then your spouse is a geocacher by proxy, unless of course they have no idea why you duck out for the paper and come back in three hours!

The term "muggle" originated in Harry Potter novels where it meant a non-magic user.