1. One of a clan of obese, slovenly individuals taking no pride in physical appearance, health, or food consumed, uniquely characterized by his innate ability to act like a complete braggadouche at every social opportunity and love of dice-based role playing games.
2. To behave as same.
1. That Nell Carter sure is a jimernsberger.
2. That guy really jimernsbergered me when he spoke ill of me behind my back and then had sex with my male dog.