piece of one

Noun

idiomatic informal

Japanese Meaning

誰かの興味深い一面を知る機会 / 誰かと喧嘩する機会

If you talk to his ex, you might get a piece of one about him.

彼の元カノに話をすれば、彼について面白いことを知るきっかけが得られるかもしれない。

Sense（1）

(idiomatic, informal) A chance to find out something interesting about someone.

The paparazzi followed the famous actor everywhere - they all wanted a piece of him.

Sense（2）

(idiomatic, informal) A chance to fight with someone.

You want a piece of me? Go ahead and take your best shot!