What 퓤 means
퓤 is a Hangul syllable block that represents one syllable.
A reader-friendly breakdown is ㅍ + ㅟ + ᆿ: an initial consonant, a vowel, and a final consonant. Unicode normalization can store Hangul as separate position-specific letters (jamo) or as a composed block; the separated forms may look different from this breakdown.
Hangul was designed to write Korean speech. Its earliest documentary record is tied to 1443; the Hunminjeongeum, a book explaining its principles, appeared in 1446.
What does 퓤 mean when someone sends it?
Read it as a fragment of Korean text.
A message containing only 퓤 does not identify a mood or social signal. Ask which word or sentence it belongs to before reading tone into it.
Questions people ask
1Why does 퓤 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 퓤
퓤\D4E4Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.