one's pigeon
自己的责任或事情one's responsibility or affair
I don't care where the money comes from; that's not my pigeon.我不管钱从哪儿来,那不是我的事。

He has a carrier pigeon.他有一只信鸽。
Keeping carrier pigeons is his hobby.养信鸽是他的业余爱好。

［词源］＜古法语pijon(小鸽子)