Someone in my work group said she had gotten over a fear food and so I couldn't help but laugh.
Oh you laughed? Why did you laugh about someone getting over a fear food?
She said she was over some certain food and added the word "fear" as some fake proof. I had to laugh as it sounded so fake.
Fear food might sound strange to you, but it's not okay to laugh at her when she's sharing that she got over her fear food. You probably made her feel silly for having a real problem, and it could make her unlikely to talk about problems in the future. You should have just told her something like 'good job'
Whatever, I don't like her.
Just because you don't like her doesn't mean anyone else will care if they hear you being so cruel. She was being very brave to speak up about having a fear, and you laughing probably hurt her. Now people will like you less.