Nonce word

Okay kiddo, a nonce word is like a made-up word that people only use once, or just for a very special occasion. It's not a regular word that you'll find in a dictionary. It's like when you make up your own secret language with your friends and you come up with new words that only you guys know the meaning of. So a nonce word is kinda like that, but grown-ups use it too sometimes. Does that make sense?