三次元

Borrowed from otaku vocabulary, '三次元' (three-dimensional) is how anime and manga fans refer to the boring, messy, unromantic real world — as opposed to '二次元' (2D), the idealized realm of fictional characters. It's used with fond exasperation, like sighing 'ugh, reality again.' When a fan says their 3D life is a disaster but their 2D waifus are perfect, they're living in 三次元 but their heart belongs elsewhere.

As Chinese anime fandom exploded in the 2010s via platforms like Bilibili, fans adopted Japanese otaku slang wholesale. '二次元' became a badge of identity for a generation escaping academic pressure and bleak job prospects through fiction. '三次元' emerged as its natural foil — a shorthand for all the disappointments of adult life that 2D fantasy conveniently lacks.

来自二次元文化，指现实的三维世界，与虚拟的二次元世界相对，常带有无奈或嫌弃的语气。