Foam at the mouth is a common term used to describe cowards such as xbox 360 customer support. You call and expect to speak to a human but it usually ends up being a slumdog millionaire from Indonesguatamalzimbabwe. Oh and you never get anything resolved ever.
Justin- "Hey can I get my xbox fixed??"
Coward Xbox Support guy- "NO!!! Bahlalalahalah I foam at the mouth all the time gar pah!"