BUSUI stands for Ibu Menyusui, which translates to "breastfeeding mother" in Indonesian. This term is commonly used in online communities to refer to breastfeeding mothers. BUSUI has become a popular term among new mothers who share their experiences, advice, and support with one another online.
If you’re looking for a translation or an explanation of what each part means, here’s a quick rundown (the words appear to be Indonesian/online‑chat slang, and the exact meaning can vary by context):