english
                    
                    
                    
                        1
                           general:: 
                           Phrase(s): knock one’s knees together  Fig. [for one’s knees] to shake together from fright.  •  I stood there freezing for ten minutes, knocking my knees together in the cold.  •  It takes a lot of energy to knock your knees together.
                           
                           
                           
                           
                        
    
                       
                    
                        
                        
                        
                    
 
                    
                        McGrawhill's American Idioms And Phrasal Verbs