Letter drop: verb. The act of mispronouncing a word by young children due to missing letters.
You can read Part I here.
A few days ago, Monkey Son #2 went to the pediatrician to get a check-up and vaccinations. Later on that evening, I asked Monkey Son #1 what we had done that day. He remembered Monkey Son #2 had been to the doctor and proudly announced that his brother got shot.