This is an efficient and very used martial art technique to take an opponent down. It is twice more lethal than its little brother the single leg takedown. Masculine is used in generic terms; it represents either men and women.

[edit] Steps

Fake a jab to the face of your opponent to try to make him close his eyes. This is to prevent him from realising what you want to do and sprawl on you.
Put one of your knees on the ground right between both of your opponent's legs and get down low, with both your knees bent and your back straight. This will put your powerful thigh muscles into play and stop you from hurting your back.
Grab both of his legs, one in each hand.
Stand-up.
Pull his legs aside of you.
Charge your shoulder on his stomach (your head should be under his arm).
Drag him down.

[edit] Tips

• Keep your elbows in tight to your sides and keep your torso aligned virtical (shoulers over hips, body relatively straight) as you "shoot in" to take the double leg takedown.This prevents an opponent from being able to hook your arms above the elbow.
The Shot : lower your level and take a step with your lead foot. Then, fall to your dominant leg's knee and drag your non-dominant leg through and come to a knee with your non-dominant leg. If you are a righty, you should end up on your right knee. You will have your non-dominant leg placed off to the side of and behind your opponent's body (see the picture of the marine in the article How to Wrestle, for an idea of what this should look like). From here, come back up to your feet while driving your head into the opponent's side. Pop your hips into your opponent to add explosiveness to your lifting your opponent once you're back to your feet.
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http://www.youtube.com/watch?v=nQQ7pYgjf1Q&feature=user This is a demonstration of a Double-leg Takedown, Shoulder throw, Shoulder-lock, and Rolling Achilles Leg Lock.

[edit] Warnings

In wrestling, it is illegal to gouge or strike at the eyes.
In wrestling, do not shoot with your head down or while looking at the ground. Keep your head up.