My family sometimes uses words in unusual ways. For example:

The word "umang" means "hermit crab" in Tagalog. In my family, this is what we call somebody who borrows clothes from someone without permission. One time I wore my sister's sweater and someone took a picture of me and posted it on facebook, and my sister saw it. I got caught being an umang. We also use it as a verb. "Do you know where my blue jacket is?" "I saw it in Crystal's car. She must have umanged it."

We use "floor shrimp" as a euphemism for cockroach. A few years ago, two buffet-style restaurants near where I lived had health violations at the same time. One had roaches while the other got in trouble for having an open crate of shrimp on the floor. One of those restaurants came up in conversation once and my brother asked whether I was talking about the restaurant with the roaches or the floor shrimp, and then he pointed out that roaches are basically floor shrimp. Ever since then, that's what we've called roaches.

Dilis is a type of dried anchovies that people eat in the Philippines. My mom says that she has to use a special kind of lotion or else she'll be "dilis," as in dried and shriveled up.

In my family we call lemonade lemedoad (the end rhymes with road)

My family actually compiled such a dictionary :) In our case mostly for invented words.

well if we made a family dictionary that would take a lot of time. also that family would have to make their own at least im pretty sure......

For multicultural communities like those with duolingo,slang language does harm and does not benefit.Also,professional style of language may differ than the social style but both are recognized.I think that dialects inside families varies,where you may meet a dominant or recessive one.