The reason Hippos are the most dangerous and most feared is because hippos kill more people in Africa then all the carnivores combined. Hippos are very territorial and will flip your boat and drown you in the water, stomp the crap out of you, or just bite down on you.
Noun. 1. jeopardy-a source of danger; a possibility of incurring loss or misfortune; drinking alcohol is a health hazard. endangerment, hazard, peril, risk. danger-a cause of pain or injury or loss; he feared the dangers of traveling by air. health hazard-hazard to the health of those exposed to it.
A J tag means that there was a finding that resulted in immediate jeopardy. What was the issue? If a facility gets an immediate jeopardy, then whatever it is/was must be corrected immediately. The facility must present a plan of removal to the survey team usually before the team can leave the building for any reason.