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?"
"So are you two going out?"
"I dunno, she's being all gay and withdrawn, I think it's a yes-no."
Australian origin: No. As in yes, I take your point, but let's be diplomatic: no, you're absolutely wrong.
A: So is the stove that I fixed working yet?
H: Yes no one of the burners is still on the blink.
A means of implying that a question asks only for a positive or negative answer.
"Have you ever seen this man, yesno?"
A multidimensional answer to a complex question that is projected into a quasiboolean scalar response value.
Natasha: Are you happy with your job?
yesno - n - having no idea what to say to a given question, but not wanting to look stupid and say that; can also be used as a verb
Lauren: Should I go out with John?