Overpitching is when too much yeast is pitched into the wort. If this occurs, the most common symptoms is a very yeasty-flavoured beer, beer that is fermented too quickly and has high fermentation temperatures as a result. This is a very uncommon in a home brewing setup for the following reasons:
1- Most yeast packets- even liquid yeast starters- are considered by experts in the field to be either *just* enough yeast to ferment a 5 gallon batch or even to be underpitching.
2- It takes a lot of yeast to overpitch.
