What is Yes-no?
1.
When a guy asks a girl out and she tells him yes, but really means no because she's too nice to say no, which in turn messes with him more because he continues to think he has a chance, but really doesn't.
"Wanna go out with me this weekend?"
"...Yes."
"So are you two going out?"
"I dunno, she's being all gay and withdrawn, I think it's a yes-no."
See