My brother has a close female friend with a nine year old daughter that is usually there when they hang out. One day I was talking to him about something, can't remember what, but I used the term pickme, and he then asked me what it was because the kid used it.
Apparently there's a boy in her class, in elementary school btw, with six girlfriends who all know about each other. And this kid called them all pickmes. I asked him where she heard it before and he said he had no idea.
Then I think back to what he's said of her mother, his friend. She's divorced from her shitbag husband, relentlessly fights him to keep custody no matter how much he tries to steal her kid. She's fit, attractive, financially independent and gets idiots way under her league to pay for her dinner all the time. She's anti porn and scolds the shit out of my brother for watching it and when he says objectifying things. She can keep a platonic relationship and actively works to mature him for his own benefit, not out of even the slightest interest in dating. He in a typical male fashion complains about her "way too high" standards. I don't think she's even aware of this group's existence, at least I highly doubt it. And I don't think she's ever used the term pickme herself. But regardless of where the kid heard it, it's clear she was influenced by her high value mother, and it really brings a smile to my face.