Young and impressionable, perhaps, but not stoned. The thing that interested me most about their unintentional coinage of this term was the way they were using it inferred that muscularity is a masculine trait which is inappropriate for a woman to exhibit. I highly doubt their classmate was ripped, so I can't help but wonder what it was about a girl having an athletic appearance that incited them to badmouth her efforts to take care of herself.
She didn't fit into the mold of what a "girl" was supposed to look like?
Personally, I hope that strong girl keeps working hard, and when she's out doing triathalons and sports events long after those other girls can climb a flight of stairs without getting winded, I hope she runs into them signing up for some fluff fitness class at the gym and laughs at what their arms look like now.
Jealous, they were.