partner in crime

Noun

humorous informal

A criminal accomplice. / (informal, humorous) A close associate.

Japanese Meaning

犯罪の共犯者 / 親しい仲間（冗談交じりの表現として）

He has been my partner in crime since we pulled off that small bank job two years ago.

彼は、2年前にあの小さな銀行強盗をやって以来、私の共犯者だ。

Sense（1）

A criminal accomplice.

Sense（2）

(informal, humorous) A close associate.

partners in crime

（ plural ）