"Stay home when you're sick. No one likes an outbreak monkey."
Usually, an outbreak monkey is someone who works with and/or has their own young children ( esp. a teacher and/or mom. A mom who works as a teacher could be considered a "double" oubreak monkey).
An outbreak monkey can also be a young person who would otherwise be healthy but refuses to rest/stop partying, thereby weakening their own immune system and causing them to catch and bring back any cold/flu circulating that season. College dorms are famous for housing multiple outbreak monkeys at one time.
It has also been argued that young children could be considered outbreak monkeys in their own right but this is subject to ongoing debate.
Another common feature of anoutbreak monkey is that they are "used" to being sick often and therefore do not take the necessary precautions to ensure that others do not become sick. To an outbreak monkey sickness is a way of life. They are sick so often that staying home from school/work every time they were sick would cause them to get fired/fail. As such, they often come to school/work in various stages of illness only to infect others, thereby living up to the true title of "Outbreak Monkey".
F*cking outbreak monkey, Eddie, got us all sick again before finals week.