A person, preferably a man, who is social awkward. Usually has a "deep in thought" look on their face, even though this person rarely thinks. Can being knocked down by a weak gust of wind. Commonly referred to as a, "Steven Plaisance." A person who acts foolish, strangely, or ignorantly. Jagaloons should be kept out of reach of children and monitored around small animals.
The only thing worse than being a loseroni is being a jagaloon.