Flop sweat is a slang term used to describe a sudden and excessive sweating that occurs when someone is nervous, anxious, or stressed. Aside from flop sweat, there are several other synonyms used to describe this condition. One is anxiety sweat, which denotes the sweating that is caused by heightened emotions. Another synonym is stress sweat, which is sweating caused by the release of stress hormones. Other terms include clammy palms and nervous perspiration, which describe sweating exposed through the palms or other parts of the body. Whatever term is used, flop sweat can be discomforting and may indicate an underlying mental or emotional condition that needs to be addressed.