What is Barren Slag?
A girl who dresses like she wants to fuck, acts like she wants to fuck, but will not put out.
"Did you see me with that girl? She let me grab her tits is dressed like a slag..."
"Oh yeh, I know her, she never puts out she's just a barren slag!"
"So what are the girls in your halls like?"
"They are just a bunch of barren slags, I can't be fucked with them!"