As Emma and I were getting out of the car on Wednesday:
M - "Tomorrow is garbage day."
After a seconds pause;
E - "Mama what does 'bitch' mean?"
After staring at her in surprise for a second, and taking a deep breath,
M - "Where did you hear that word?"
E - "You said it." (this was said with a little "duh" tone to it).
M - "When did I say that?"
E - "You just said that tomorrow is 'car bitch day.'"
M - (while chuckling) "Oh! I said that tomorrow is GAR-BAGE day." Then I pointed at the trash can.
E - "Oh, ok."