Used in Special:Preferences, first tab, as one of the selectable options of the ("How do you prefer to be described?") prompt. Choosing it indicates that the grammatical gender of the user name should be "male" for those languages having a "normal" male grammatical gender.
You have to customize this example for your language if needed to have a sentence which varies depending on the grammatical gender. The wording must demonstrate the actual usage of the option. It should sound like a reply to("How do you prefer to be described?").
For example, if the verb "I edit" in your language is different in masculine and feminine, translate "I edit" in masculine here. If your language does not make a distinction at all, use sentences like "he is male/a man".