What jokes have you made because of a slip of the tongue?

Junior high school likes a girl, but she is overbearing. Once she quarreled with some boys, I gently said an old bitch, and then when it was time to dump her words, she looked back at me, fearing that she would not dare to say the word "woman" when she heard it. Later, the whole class knew that I called her wife. Now that I think about it, I feel a dull pain in my back