You may not have lost all your marbles, but there's definitely a hole in the bag

You may not have lost all your marbles, but there's definitely a hole in the bag

When someone says, "You may not have lost all your marbles, but there's definitely a hole in the bag," they are essentially implying that the person in question is a bit crazy or eccentric. This phrase is often used in a lighthearted or joking manner to suggest that someone is not completely mentally stable, but they still have some sense left.

Being told that there is a hole in your bag of marbles can be a humorous way of acknowledging that someone's behavior or actions are a little out of the ordinary. It suggests that while they may not be completely insane, there are definitely some quirks or oddities about them that set them apart from others.