Yes, "Boujee" is generally safe for children when it comes to language, but reference means something. It is used to describe someone with a love for expensive tastes or luxury. If not aggressively, it can sometimes bear the attitude of materialism or pride. Parents may prefer to explain the meaning of children if they use or listen to them. It is usually used in music and online culture, so it will probably have an opportunity for older children and young people.