When my neighbor's son was three, she had a daughter. Her son had severe speech problems and she had a speech therapist come to the house every morning. Within the next year or two, his speech improved, but strangers often had a hard time understanding him. My neighbor said that his sister, now a toddler, was really bugging him all day, touching his toys, etc., in that annoying way that little sisters have.

Finally fed up, he blurted out, "Nicole, you've been up my ass all day!". His mom was alternately thrilled because he said it clear as a bell, and also wanted to die because it was obvious who he had learned the phrase from.