出しゅっ世せ頭がしら

noun

most successful person (in a group)

Used to refer to the person who has achieved the highest success or status among a specific group, such as classmates, relatives, or colleagues.

• 彼かれは同どう級きゅう生せいの中なかで出しゅっ世せ頭がしらだ。

  He is the most successful among his classmates.

• 兄きょう弟だいの中なかで一いち番ばんの出しゅっ世せ頭がしらは次じ男なんだった。

  The most successful of the siblings was the second son.