念念不忘是绝口不提吗
[niàn niàn bù wàng shì jué kŏu bù tí ma]
This Chinese online nickname conveys a feeling of deep-seated remembrance. '念念不忘' means someone or something is always on one's mind, never forgotten. The latter part '是绝口不提吗' (Does it mean not mentioning it at all?) adds an ironic twist: though you can't stop thinking about something, you choose never to speak of it, hiding your true feelings.