The Brief: "Has entered the chat" is a phrase on social media typically used as a response in discussion or debate indicating an individual or thing is of interest to the topic and has the ability to counter or top said remark.

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The phrase “has entered the chat” on social media is normally used as a response in discussion or debate. The comment indicates that an individual or thing that is being called upon is of interest to the topic and typically can trump the previous claim or remark. This  phrase is intended to be humorous.

“Has entered the chat” is a reference to old chat rooms that advised other users when an individual entered the online conversation. It is similar to the comment “is typing…”

The earliest definition of the phrase “has entered the chat” dates back to March 4, 2019 on Urban Dictionary.