Μια κλωστή μέσα μου κόπηκε

[altan]

Hi! Is that an idiom?

 

[nickel]

Hi, Altan. It is an idiom, and it is obviously a figurative use. In a dictionary one would find the meaning as 'a bond was broken', denoting the end of a relationship or of something that connected someone with a person or a place etc. It more often appears as 'έσπασε η κλωστή'.