night-tripping

That trips or moves lightly about at night.

We shall thence pursue our course through Arabia, till we arrive at the middle-age romance of Europe, and the gorgeous realms of Fairy-land; and thence, casting a glance at the "Faerie Queene", advance to the mountains and forests of the North, there to trace the origin of the light-hearted, night-tripping elves.

The act of making an excursion at night.

"I was given the monicker in med school, because my name was John and I did a certain amount of night-tripping."