What does the word "jiken" on young Luffy's shirt mean in Japanese?

Question

In One Piece manga, young Luffy wears a shirt containing the word "jiken".

What does "jiken" mean in Japanese?

Answer 1

In this context, jiken (事件) means "incident" or "case".

The full picture indicates tamago jiken which literally means "the egg incident" where a chick is killed due to the egg getting cracked.

There might not be any deeper meaning considering Oda's nature of humor.