A name for a frikin awesome person. They will normally be shy at first, so you gotta let them warm up to you, though that doesn't take long. If you meet a brennah, you better treat them right. If you don't they will go into mass depression and/or become suicidal. When in a good mood (which is usually all the time) they are funny as hell, good natured, and sweet. You're lucky if you have a brennah as a friend.
Person: She's so shy.
Person 2: She's really funny, once you get to know her. Her name's brennah.
Person: Ah, figures.