What Does "TT (or TT)" (ㅠㅠ) Mean in Korean?

This is a very common internet emoticon used to visually represent crying eyes, with the 'ㅜ' characters looking like eyes and the vertical line of the 'ㅠ' representing tears. It's almost exclusively used in informal written communication, especially between friends and close acquaintances or online communities. It's not spoken aloud. While it usually indicates sadness, it can also be used for playful pouting, mild frustration, or even overwhelming cuteness/pity in certain contexts, much like the English 'T_T' or 'ಥ_ಥ'.