legging

pitkikset, leggingsit A covering, usually of leather, worn from knee to ankle.
Tight fitting leg coverings worn, for example, to gym.
One of the legs of a pair of trousers.
Take the legging and turn up the cuff.
The process of putting a series of three or more options strikes into the stock market.
2000, Michael Williams, Amy Hoffman, Fundamentals of Options Market (McGraw Hill Professional, page 128)

As a practical matter, you cannot put on these positions simultaneously at reasonable prices. In order to achieve these positions at a reasonable risk/reward profile, you must put the positions in a series of separate trades. This process is called legging.