In the Breaking News Chat, the term "Chat Guy" refers to an individual who manages a prominent, paid chat room and has a substantial following. 

While it is not advisable to blindly follow their actions, being aware of their activities can help explain the movements of certain stocks. However, it's worth noting that their identity may change over time, and identifying them specifically is not essential. 

The focus should be on understanding market dynamics and gaining insights from various sources rather than relying solely on any one individual.