Meaning:

“这集” means “this episode,” and “我看过” means “I have watched before.” Literally translated as “I have watched this episode before,” this saying is used jokingly by Chinese netizens in real-life scenarios where things happen exactly as expected. It first appeared in “bullet screen” comments at online streaming sites where people mock overused plots.

Example:

A: 我在美国的朋友说昨天去超市买东西，发现好多货架都空了。

Wǒ zài měiguó de péngyou shuō zuótiān qù chāoshì mǎi dōngxī，fāxiàn hǎoduō huòjià dōu kōng le。

My friend in the United States said he found many shelves vacant when shopping in the supermarket yesterday.

B: 这集我看过。他们也开始囤货了。

Zhèjí wǒ kànguò。Tāmen yě kāishǐ túnhuò le。

I knew it! They have started hoarding stuff now.