台Taivo A Taiwan Mandarin dictionary

扶弟魔

fúdìmó

ㄈㄨˊ ㄉㄧˋ ㄇㄛˊ

1(coll.) (neologism c. 2017, a play on 伏地魔[Fu2 di4 mo2]) woman who devotes herself to supporting her little brother (assisting him with his studies, giving money to help him buy a house etc)

Keep 扶弟魔 and it comes back until you know it.