Meaning:

An intentional mispronunciation of the English term “thank you,” this saying is used sarcastically to express one‘s frustration at someone or something outrageous. It‘s similar to “I’m speechless.” It originated from a Douyin (short video sharing social media platform) video in which a Guangxi farmer-turned-tour guide uses badly pronounced English to introduce the beautiful landscapes of Guilin. He concludes his presentation with “Welcome to Guilin; welcome to Yangshuo. Thank you” and pronounced “thank you” as “shuān Q.” Some Chinese netizens thought it funny and imitated his accent, also giving the saying a sarcastic meaning.

Example:

A: 听说你去北京出差了，一切都顺利吗？

Tīngshuō nǐ qù běijīng chūchà le， yīqiè dōu shùnlì ma？

I heard that you just returned from a biz trip to Beijing. Did everything go smoothly?

B: 来回飞机都晚点超过一小时，我真的栓Q。

Láihuí fēijī dōu wǎndiǎn chāoguò yī xiǎoshí， wǒ zhēnde shuān Q。

The flights to and from Beijing were both delayed for more than an hour. It’s so annoying!