A general term used to describe russian made unguided rockets (or rockets made of russian designs). These are currently in common use in the middle east
The name Katyusha is of Russian origin.
It can be used to refer to Russian dumb fire rockets or to someone that goes by that name. It’s a girls name.
It was also the name given to the song composed by Matvey Blanter in 1938 just before the start of Second World War.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).