What does this Cantonese sentence "冧哥覆咗你未?" mean in English? What does this Cantonese sentence "冧哥覆咗你未" mean in English?
冧哥 (the subject) roughly means "Mr. Sweet talk" (冧 has the meaning of "sweet talk" or "coax"; adding 哥 to the end of a noun is a common way to nickname someone. )

覆咗 = replied (覆 is short for 答覆; 咗 is a word particle that indicates the verb is completed, It functions the same as 了 in Mandarin)

你 = you (the object)

未 = has not/ not yet 

"冧哥覆咗你未?" = "Mr. Sweet talk replied you? (or he) has not?" = "Has Mr. Sweet talk replied you yet?"