Держаться на ниточке
Держаться на ниточке
                                 [derzhat`sya na nitochke]
                                                 - to hang by a hair
                           
                  What it means: 
                  to be in very dangerous situation, to be in critical situation. About something that can just break, tear.               
                      
          
          
          
          
          
          
         

