n. a mammal related to the mongoose, filling the role as largest mammalian predator on the island of Madagascar. It is particularly adept at hunting lemurs. It is properly spelled fossa, but the spelling "foosa" is a more accurate phonetic spelling.
A foolish person (particularly one that has a propensity for hooliganism) that chronically makes obviously bad decisions, but who also continuously shrugs them off in an "i am living my life, don't bother me" kind of fashion.