We have so many! I don’t even know what to pick. We even have picked up some from our dog! If someone really wants something from another member of the family, we’ll mimic our dog’s head tilt, open our eyes wide, raise our eyebrows, and give a little whimper. 
Our D called broccoli “little trees” when she was a baby. That has stuck.
We also have code words when people are being pretentious based on a long repeated family story.