Crazy peolpe
What phrases do you usually use, when talking about strange and crazy people? I mean such phrases like "he has his own rats in the attic" ?

Question

Answer

I haven't ever heard the "rats in the attic" phrase and I would interpret it more as having his own problems/ dirty business rather than being crazy.

Mostly words rather than phrases are used in reference to weird/crazy people
1. Cuckoo (sounds like kookoo)
2. Psycho
3. Weirdo

he/she "has a couple of screws lose" "not right in the head" "Mad as hatter"
"Lost his/her marbles" "stores open but nobody's shopping"

Hope this helps