What do I do if a old guy stranger on the street called me anorexic today?

He was about to bunp into me and he said 'Watch where you're going anorexic'

I didn't even do anything to him. In fact i noticed him walking weirdly and tried to move to one side but he then tried to go to the side i was walking so i went on the other side and then he passed me finally and he said that to me.

What do I do if a old guy stranger on the street called me anorexic today?
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