Here are some possibilities that might be related:
* "Dropping the dog" - This could be slang for "getting rid of" or "abandoning" a dog, which is unfortunately a real issue.
* "Dropped by the dog" - This could refer to something being accidentally knocked over or destroyed by a dog.
* "Dog dropping" - This refers to dog feces, which is not a pleasant topic but is a common occurrence.
To understand the meaning accurately, please provide more context. For example, tell me:
* Where did you hear this phrase? (e.g., in a conversation, online, etc.)
* What was the context? (e.g., what were people talking about?)
* What was the overall tone? (e.g., serious, humorous, etc.)
With more information, I can help you figure out what "dropped dog" means.