Have you been called a whale?

Okay so my sister is honestly one of the most annoying people I have to deal with (I have 4 sisters) and she has no filter.

I was helping my mom serve dinner last night and she was like ruth is the only one helping and she's a whale!

Is that a thing? It honestly bothers me. I am a big girl (225 @32 weeks pregnant) but I don't think anyone is justified In telling me I'm a whale. That is name calling to me.

How do you react to such things? Do people close to you say anything like that?

Edit. My sister is jealous I'm sure because this is my second child and she can't really keep a boyfriend probably because of comments like this and the fact that she has no filter.

Two of my other sisters were like well isn't that a thing? I'm like no dude.