Ditsoon is a derogatory slur used in some Caribbean and South African contexts. Considered offensive; not appropriate to use. Worth a serious conversation if your teen encounters or uses it. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in. Most slang of this kind moves through TikTok and group chats, so seeing it in your child's vocabulary just means they are plugged into normal teen internet culture.