開埋井俾人食水 (hoi1 maai4 zeng2 bei2 jan4 sik6 seoi2) — to work so hard for something (especially something that one has initiated from scratch) only for someone else to take the credit in Cantonese
hoiˉ¹開maaiˎ₄埋zengˊ²井beiˊ²俾janˎ₄人sikˍ₆食seoiˊ²水简 开埋井俾人食水
Mandarin Pinyin: kai1 mai2 jing3 bi3 ren2 shi2 shui3
Meaning of 開埋井俾人食水
nounto work so hard for something (especially something that one has initiated from scratch) only for someone else to take the credit