be waiting for the other shoe to drop
To be waiting for the next, seemingly unavoidable thing to happen. This phrase often has a negative connotation. Mom said that Dad would punish us when he got home from work, so now we're just waiting for the other shoe to drop.
be waiting for the other shoe to drop
AMERICAN, INFORMALIf you are waiting for the other shoe to drop, one very bad thing has already happened and you are expecting another bad thing to happen soon. People are already on edge, and they're waiting for the other shoe to drop. Note: The idea in this expression is that you almost never hear only one footstep; another usually follows.