"Undercooked meat" refers to meat that has not been cooked for long enough or at a high enough temperature to be fully cooked. This means that it may still have some raw or pink areas, which could be unsafe to eat. Full definition
These animals can carry the hep E virus, and the CDC warns that it's possible to get the virus as the result of eating undercooked meat from infected animals. (health.com)
Toxoplasmosis is a disease that can be transmitted from cats to humans by ingestion of undercooked meat products or contact with the stool of a contaminated cat. (suffieldvet.com)
Some bacterial infections clear up on their own, but some, like that from the E. coli that can be found in undercooked meat and other food sources, can be very serious. (babycenter.com)