When my granddaughter was three, I babysat her each Friday morning while my daughter was "Room Mom" for my grandson's kindergarten class. Once, when I went into my granddaughter's bedroom to get her dressed, she was jumping up and down on her bed repeatedly singing "Brendan (her brother), is a poo-poo head." I told her not to use that word and, if she continued to use it she would have to go sit in her time-out chair. She stopped. The next week I go into her room and she's jumping again and says, "Grandpa, I made up a new song." As I get her clothes out I say "Well let's hear it." She starts singing "la-la-la, dee-dee, duh-duh, poo-poo..." I tell her she still can't say that word or else... So she stops. The third week I come in and she says, very excitedly, "Grandpa, grandpa. Guess what? We going to have Chinese dinner tonight and guess what I'm going to have...the Pu-Pu platter! HA-HA-HA-HA." I had to let her have that one.
When my youngest brother was a toddler a banana was a namby-nam, an elbow was a belbo, and a hamburger was a hang-ga-burr.