me and my big mouth

An expression of regret after realizing that one has said something inappropriate, hurtful, or meant to be kept a secret. I accidentally let it slip that there would be a surprise party for her birthday—me and my big mouth! Me and my big mouth—I'm sorry, dear, I didn't mean to hurt your feelings.

me and my big ˈmouth

(spoken) used when you realize that you have said something that you should not have said