Kacchan - A nickname you get if you bring up some embarrassing memory

A nickname you get if you bring up some embarrassing memory from when you were five. It's basically the worst thing that can happen at a party.

My cousin brought up how I cried when I fell off the slide. Now I'm Kacchan.

At the party, someone said I used to wear a chicken costume. Kacchan is my new name.

My friend brought up my old dog. Now I’m Kacchan for life.