Evolved from 栓Q (2022) - 会谢 literally 'will thank (you)' is the Mandarin back-translation of the sarcastic 'thank you' meme, reclaimed as a pure Chinese phrase. Popular on Weibo and Xiaohongshu from 2022.
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Casual internet use. Conveys resigned sarcasm - closer to English 'thanks, I hate it' or 'I'm speechless' than literal gratitude.