怎样描述男生心仪的傻女孩

9.She really has no guts.  
她真是没骨气。

       guts是内脏的意思，人们将其引申喻指勇气、毅力或力量等。hate to the nuts的意思是对某人恨之入骨。

如：She really has no guts. If I were she, I would shouted back.
       她真是没骨气。要是我的话肯定要喊回去。