sweat it out
idiom
        informal      
      
                                1
                    
                                US 
                                  
              
          
                                                      : to work hard at (something)                                      
              
                             
She was sweating it out on the treadmill.
                         
                
                    2
                    
                                          
              
          
                                                      : to feel worried or nervous about something                                      
              
                             
We'll let them sweat it out for a while longer before we give them the test results.
                         
                
                    3
                    
                                          
              
          
                                                      : to wait nervously until the end of something                                      
              
                             
It was a close game, and the fans were really sweating it out at the end.
                         
                
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  Merriam-Webster unabridged




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