For instance, you might see someone saying, “被美食硬控30分钟 (Bèi měishí yìng kòng 30 fēnzhōng), I’ve been hard-controlled by delicious food for 30 minutes.” This indicates that the person found the food so enticing that they couldn’t stop eating it. Similarly, “被彩虹硬控5秒 (Bèi cǎihóng yìng kòng 5 miǎo), I’ve been hard-controlled by the rainbow for 5 seconds” suggests being mesmerized by the beauty of a rainbow.
This term has become a popular way to express deep fascination or an irresistible attraction to something, be it food, scenery, or even an engaging conversation.
Source: eChineseLearning