Come, ROVER!' is a command often used by dog owners to summon their pet. It is a way of telling the dog to COME towards the owner. This phrase is a common command used by dog owners to call their pet. It is an instruction for the dog to COME towards the owner. The phrase is composed of two words, 'COME' and 'ROVER', with the exclamation mark at the end emphasizing the command. The word 'ROVER' is often used as a generic name for dogs, although it can also refer to a specific breed of dog.