返券黃牛 [ㄈㄢˇ ㄑㄩㄢˋ ㄏㄨㄤˊ ㄋㄧㄡˊ; fan3 quan4 huang2 niu2] "shopping coupon scalper", sb who sells unwanted or returned shopping coupons to others for a profit ◄ ►