What term refers to allowing foods to remain for too long at a temperature that allows the growth of germs?

In the food industry, this is called 'temperature abuse'. It can lead to outgrowth of harmful bacteria, increase the rate at which food spoil and cause food quality issues.

Time temperature abuse

Explanation:

When the Food has stayed too long at temperatures that are good for the growth of pathogens which is usually four hours or more, then the food is said to be subjected to time-temperature abuse.

The reason for the spoilage of food during time temperature of abuse can be:

Not storing the food at the correct temperature. Not cooking the food enough to kill pathogens. Not cooling the food correctly.