love it when some random fat Karen goes and tells you what you are eating is not healthy with a disgusted look

I had a coworker that struggles with a eating disorder. She left to find another job. My very large overweight manger talked me about her, making fun of her illness and asked if she texted me recently. I said no. He said next time she does I should say
Sorry but i don't text fat people.

I just looked at him unsure what to say.