Osho No Mind
Osho first introduced No-Mind meditation during his evening Zen speeches. Then, it became a seven-day course for two consecutive hours a day. In the first hour, participants make gibberish. In the second hour they sit quietly, doing nothing.
Here is an excerpt from the speech in which Osho first introduced this meditation:
The first part is gibberish. The word “gibberish” comes from a Sufi Mystic, Jabbar. Jabbar never spoke any language; the words he uttered made no sense. Yet, he had thousands of disciples, because what he said was in fact: “Your mind is nothing but gibberish. Put it aside and you can taste the taste of your being”.
To use gibberish, simply say words that have no meaning at all, use a language you don’t know. If you don’t know Chinese, use Chinese. If you don’t speak Japanese, use Japanese. Don’t use German if you speak it. For the first time in your life be free, like birds with their song. Let flow everything that comes to your mind, without worrying if it’s rational, reasonable or meaningful, just like birds do. In the first phase, leave the mind and its language aside. 
The second phase, silence, is born from this space. You have to close your eyes and keep your body perfectly still, collecting your energy within yourself. Stay in the moment, here and now.
– Taken from the series, Live Zen and reported in Meditation: The first and the last freedom
