Like a zombie but faster, smarter and they live in the forests or underground. The term is used to describe when you are so scared in the wilderness that you start to think that actual half beast half human zombie creatures are going to prey upon you and your companions.
Have you seen The Descent? Yea that was like the best portrayal of a hoober joober ever.
A chill and reserve person, at first glance he may seem serious and cold but actually is a very nice person who loves to make people laugh, even if it's at his own expense. Unfortunately, they can have a very kind nature that is easily exploited, due to people taking advantage, he may have severe trust issues with even the closest of friends and family. Usually very humble and closed off, they don't like to wander too far from their comfort zone. Once you get to know them though, they can be very good friends for life who'll help you in your times of need.
"Joezer is so nice but he keeps meeting the wrong people, hopefully it doesn't happen again"