It’s just means no attraction.
Remember, women cannot afford to be honest and love living in the grey zone. They do this for 2 reasons. One, its a power trip. If the man is in any sense desperate, she gets off on seeing how desperate he is. Two, it makes her look good. A woman cannot say “he wasn't tall enough. He wasn’t handsome enough. He didn’t make enough money.” Society doesn’t like that. Yet if she says “no chemistry”, well, you can’t force love, so she gets out of it while looking decent.
Don't take anything a woman says personally. It’s all designed for HER benefit.
Come on men.