A person that you rely on to keep you happy. You can't live without them for more than a two week period before you start getting irritable and cranky. You start feeling out of place and or really crowded and overwhelmed by other people in your life that are not your bubble bouncer. This person can be a family member, friend, spouse, or boyfriend/girlfriend.
"Why are you being so pissy? Is it that time of the month?"
"No I just need to see my Bubble Bouncer"