What does 'no fat chicks' mean?

i overheard my crush the other day telling his friends he won't go for fat chicks, so now I think I won't have a chance, cause I play soccer and cycle, which leaves me with an all-over toned body which looks fuller and more curvy. will he find me attractive? what does 'no fat chicks' mean anyway?
What does 'no fat chicks' mean?
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