I remember playing it often.

Basically it consists of a grey box and a button or so.
This game can be only played online.
To play the game you have to type random characters whether they make sense or not(only exception, no profanities). Your rivals have to do the same thing the winner is the one who could sustain the act for a longer duration. Extra points, If you can type and send them quickly.

Anyone remember the name of the game ?