verb, Internet, neologism
to quit fandom (syn.) 退坑
verb, Internet, broadly, neologism, of a creator, usually
to abandon one's existing franchise; to stop working on a piece of creative work (syn.) 棄番, 弃番
這系列已經進行了十年了，作者怎麼就突然棄坑了呢，好可惜。
这系列已经进行了十年了，作者怎么就突然弃坑了呢，好可惜。
zhè xì liè yǐ jīng jìn xíng le shí nián le ， zuò zhě zěn me jiù tū rán qì kēng le ne ， hǎo kě xī ． This series has been ongoing for ten years, so why would the author abruptly abandon it? How pitiful.
verb, neologism
to stop consuming an entertainment media; to cease reading/playing/watching a piece of creative work
棄坑了！這遊戲又肝又氪，還有沒有點良心！
弃坑了！这游戏又肝又氪，还有没有点良心！
qì kēng le ！ zhè yóu xì yòu gān yòu kè ， hái yǒu méi yǒu diǎn liáng xīn ！ I quit! This game is so grindy and money-consuming at the same time, can't they have a little conscience!
Examples (Wiktionary)
Mandarin
这系列已经进行了十年了，作者怎么就突然弃坑了呢，好可惜。
這系列已經進行了十年了，作者怎麼就突然棄坑了呢，好可惜。
zhè xì liè yǐ jīng jìn xíng le shí nián le ， zuò zhě zěn me jiù tū rán qì kēng le ne ， hǎo kě xī ．
This series has been ongoing for ten years, so why would the author abruptly abandon it? How pitiful.