The phrase "on fleek" means something is perfectly done, neat, or visually flawless, especially referring to eyebrows, makeup, or styling. The structure is informal slang where "fleek" is used to suggest precision or perfection. It became widely popular after going viral in the mid-2010s through social media and pop culture, especially in beauty and fashion contexts where people praised highly polished appearance.

英語での「on fleek」の定義と意味

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