What is another word for screw-loose?
Pronunciation: [skɹˈuːlˈuːs] (IPA) 
The phrase 'screw-loose' is often used to describe someone who is behaving in an irrational or erratic manner. There are several synonyms to describe such a person. One of the most common phrases is 'off one's rocker' or 'not playing with a full deck,' which indicates someone is acting irrationally or crazily due to mental instability. Another phrase which can be used interchangeably is "nutty as a fruitcake" suggesting that someone is mentally unbalanced. Other synonyms include "unhinged", "wacky", "looney", and "bonkers", which all indicate somebody who is not behaving in a sensible or rational way. In any case, it is best to avoid such a person in order to prevent any unnecessary drama or problems.
