It's my impression that yelo333 was being facetious as he obviously knows what a false grip is. The false grip is what allows you to perform a muscle up in a slow and controlled manner.
"The first step to muscle-up glory is learning the false grip. This grip is the secret weapon gymnasts employed during all strength skills. To set a false grip, you need to get the base of your palms on top of the rings. This is not a thumbless grip, often called a gooseneck grip. Your thumb will remain on the opposite side of your fingers. The importance of this grip is twofold. First, it shortens your arm, so you have less leverage to deal with. Second, it allows you to push from the base of your palm as soon as you reach the dip position.
1. Pull-Up 2. Pull hard right, roll left wrist 3. Pull hard left, roll and set right
Here is how to set the false grip: at the top of a pull-up, you roll your wrists over one at a time. You then lower back down and you are ready to go. It helps to keep the rings turned inwards and parallel to one-another. I recommend practicing just setting the false grip and then performing some pull-ups. This will strengthen your wrists, forearms and elbow joint for the muscle-ups to come. There is also a fast way to set your grip, but it is not recommended for beginners. Basically, you pull up hard and then roll both wrists over at the same time. If I am doing muscle-ups for reps, I set my grip in this fashion and I don't drop down to do a pull-up before my first rep. I just transition and dip. If you want to go to a complete dead hang, you actually need to turn the rings outwards as you reach the very bottom. Most people simply go as low as they can without having to do this and then move onto the next rep."
Link to complete article on learning to perform muscle ups.
"The first step to muscle-up glory is learning the false grip. This grip is the secret weapon gymnasts employed during all strength skills. To set a false grip, you need to get the base of your palms on top of the rings. This is not a thumbless grip, often called a gooseneck grip. Your thumb will remain on the opposite side of your fingers. The importance of this grip is twofold. First, it shortens your arm, so you have less leverage to deal with. Second, it allows you to push from the base of your palm as soon as you reach the dip position.
1. Pull-Up 2. Pull hard right, roll left wrist 3. Pull hard left, roll and set right
Here is how to set the false grip: at the top of a pull-up, you roll your wrists over one at a time. You then lower back down and you are ready to go. It helps to keep the rings turned inwards and parallel to one-another. I recommend practicing just setting the false grip and then performing some pull-ups. This will strengthen your wrists, forearms and elbow joint for the muscle-ups to come. There is also a fast way to set your grip, but it is not recommended for beginners. Basically, you pull up hard and then roll both wrists over at the same time. If I am doing muscle-ups for reps, I set my grip in this fashion and I don't drop down to do a pull-up before my first rep. I just transition and dip. If you want to go to a complete dead hang, you actually need to turn the rings outwards as you reach the very bottom. Most people simply go as low as they can without having to do this and then move onto the next rep."
Link to complete article on learning to perform muscle ups.