万年小受嘟迪欧
[wàn nián xiăo shòu dū dí ōu]
“万年小受（10 thousand year shou）”in Yaoi (or Boys’ Love, BL for short) represents eternal submission, while 嘟迪欧is phonetically close to the English word 'tidy' or a made-up word which doesn't bear a concrete meaning in Mandarin. It suggests someone in relationship always takes up submissive status.