ガキ大だい将しょう

noun

leader of a group of kids; neighborhood bully

Refers to the dominant child in a local peer group, often with a nuance of being bossy or a bully. The term ガキ is colloquial and somewhat rough, so the word carries a casual, slightly negative tone.

• あいつはこの辺あたりのガキ大だい将しょうだ。

  That kid is the boss of the neighborhood kids.

• 小しょう学がく生せいの頃ころ、ガキ大だい将しょうにいじめられた。

  When I was in elementary school, I was bullied by the local bully.