I grew up in a family that believed words are power and very important. My mother knew the correct quotes, but would often change them, for example she was fond of saying, "Oh what tangled webs we weave when first we practice to CONCEIVE."
My daughter has picked up my Mother's love of words and often makes up her own words which we call, "Kimi-isms" For example one day she was doing homework and I could see she was getting flustered and frustrated, she said "Mom, I am so flustrated!" It wasn't correct, but I knew exactly what she meant!
We do try to keep these words and phrases within the family, but sometimes they escape.... and we have some explaining to do. I usually just say its an old family joke, and most people laugh and move on.