Redact-A-Chat is an old-style chatroom that censors words after one use

In a statement, MSCHF said Redact-A-Chat 'forces creative communication. You must constantly keep ahead of the censor in order to continue your conversation. On the other hand, you can be that a**hole who starts working their way through the dictionary to deprive everyone else of language.'

There's a main chatroom where you can write anything, but if a word gets repeated, then it's covered with a blue blurry line and unavailable for the rest of the day.

Announcements about newly censored words and when the time starts again come from three one-eyed safety pins reminiscent of the Microsoft Word safety pin.

You can start a chat just for your friends, click the create a chat room button, give it a name and invite other people to the group with a unique code.

Read at Engadget