Breaking Roomchat

I know how to break roomchat but I shouldn't say it in here because people will then use it.

It need to be fixed now because anyone can do this and there is a chance that roomchat will be broke forever.

Already fixed, will be in tomorrow's update. Until then I'd like to politely ask people to refrain from abusing it.

I'll test it tomorrow. Then I'll give you a status.

They fixed it i tried it

What does it mean to "break roomchat"?