Que corra el aire

Que corra el aire
 

Cuando alguien se nos acerca mucho por motivos sexuales, una forma de decir no te acerques es que corra el aire. English?

She's got the gate open for you--may be understood under these circumstances or :He's/She's coming on strong.
or: He's/She's all over him/her like a new set of clothes.

In a way to turn someone down (rechazar) someone who is behaving that way you may say :Back off! --(sometimes holding you hands up a you upper chest of shoulders showing the palms of you hand) which sounds unkind.

or Easy, easy (while holding your hand out palms down somewhere below chest level).

Thanks, really helpful.