Unless you live on the Big Island of Hawaii, or visited here lately, you probably have no idea what I am talking about. None of the other islands have active volcano's, so it's a word that is used mainly here on the Big Island.
Pāhoehoe: (//; from Hawaiian [paːˈhoweˈhowe], meaning "smooth, unbroken lava"), also spelled pahoehoe, is basaltic lava that has a smooth, billowy, undulating, or ropy surface. These surface features are due to the movement of very fluid lava under a congealing surface crust. The Hawaiian word was introduced as a technical term in geology by Clarence Dutton.
Quick Link to Hawaii Volcano National Park
Here are some actual photos:
This is how you DONT want to see it!
But if you live here, this is where you most likely want to see it