1
general::
Phrase(s): drop the other shoe
Fig. to do the deed that completes something; to do the expected remaining part of something. (See also wait for the other shoe to drop.) • Mr. Franklin has left his wife. Soon he’ll drop the other shoe and divorce her. • Tommy has just failed three classes in school. We expect him to drop the other shoe and quit altogether any day now.
McGrawhill's American Idioms And Phrasal Verbs