I will take a stab at this.

He is probably divorced to his daughter's mother and Mom is the "bitch on wheels".

So, if the apple doesn't fall far from the tree, the young one is "mini bitch on wheels". I think it's funny, which is exactly the way the O.P. wanted it to be comprehended.

Either way, I see no issue with his description. Doesn't mean he calls her that to her face, doesn't mean he doesn't love his daughter, doesn't mean it's child abuse. Some of you really need to get over yourselves.

100% man.

I fired a guy that was 26 and still living at home. When he was late for the 2nd day in a row of almost 90 minutes, I rolled his tool box out in the parking lot. I kid you not, his mother called me to plead for his job. When I told her I was running an automotive business with expectations and not a babysitting service, I got called an asshole and hung up on. This happened 60 days ago.

You got it right, pure shit!