It's just a simple " yo mama" joke.

这只是一个普通的“你妈”的玩笑。

So, a sandwich, a rabbi and yo mama walk into a bar.

一个三明治，一位犹太教祭司，还有你妈妈走进酒吧。

I normally don't go against mothers, don't nobody care what yo mama said.

- 我通常不反对妈妈，没人在乎你妈妈说什么。

Come on people, it was just a yo mama joke alright, I'm a comedian.

来吧，这只是一个你妈妈的笑话，好吧，我是个喜剧演员。