This is the 11605th most frequent Spanish word.
flacas
"Flacas" means "skinny" or "thin" in English.
Here, 'flacas' is used as an adjective describing the physical appearance of the models, specifically indicating that they are skinny.
Las modelos que desfilaron en la pasarela eran muy flacas.
The models that walked on the runway were very skinny.
In this sentence, 'flacas' is used as a noun referring to thinness or the state of being skinny.
No te preocupes por las flacas, simplemente ocúpate de ser saludable.
Don't worry about being skinny, just focus on being healthy.
Here, 'flacas' is used as a plural noun referring to skinny girls or people who are thin.