everybody and his cousin

Noun

US idiomatic

(idiomatic, US) everybody; a large crowd; too many people.

Japanese Meaning

みんな（すべての人々） / 大勢の人々 / あまりにも多くの人（群衆）

When the concert was announced, everybody and his cousin tried to buy tickets.

コンサートが発表されると、誰も彼もチケットを買おうとした。

Sense（1）

(idiomatic, US) everybody; a large crowd; too many people.

Everybody and his cousin will be in line for opening night with free popcorn!