koshi koshi

Koshi koshi is a common phrase used by Nashmia. It usually means nothing yet everything. If she forgets a word for something, she uses the phrase "Koshi koshi'" to replace it.
Again, often she uses the word to censor foul language from parents.

I'm feeling a little, uh you know, koshi koshi.
You son of a koshi koshi! she says to her sister. (Dad's watching us from afar)